Just some remarks:
Wouldn’t It Be Nice (live in Big Sur) on V/A album “Celebration” (January 1971)
> this album did have a cd-release (but probably withdrawn by now).
Here Comes The Night (instrumental) on “Here Comes The Night” maxi single (March 1979)
> not to disappoint you, but there are more versions floating around, albeit DJ-versions, see below...
What I’d Say (live in Sydney 1964) on withdrawn Australian album “Beach Boys/Brian Wilson Rarities” (September 1981)
> the ‘regular’ Rarities release had a brief Japanese cd-release but is long OOP as well. So one could name all those tracks too (With A Little Help From My Friends, extended version of I Was Made To Love Her, etc)
Good Vibrations (live) on “Rock And Roll To The Rescue” single (August 1986)
> and don’t forget the R&R to the Resque instrumental mix, the Percadella mix, a vocal mix, and I think there was a 4th one…
Btw, GV live is from Live In London...
Happy Endings (with Little Richard) on “Happy Endings” single (November 1987)
> again: another (longer) edit exists, both on promo (with both versions) as on a picture-disc.
Problem Child on “Problem Child” single (July 1990)
Problem Child (instrumental) on “Problem Child” single (July 1990)
> and don’t forget the 3rd version: the radio-edit!! (hm, probably promo only, doesn't count)
And further...not that I want to discourage you...but there are more...
- Bluebirds Over The Mountain (Dutch mix). It is available on Rarities and The Dutch Singles Collection, but both are OOP now
- Never Learn Not To Love (single edit, without the intro)
- Susie Cincinnati (1970, b-side Add Some Music, first mix, different from 15BO)
- Cool Cool Water (45-edit, could be on a recent compilation though, not sure about that)
- Cuddle Up (45-edit, different from the LP)
- California Saga – California (again: not sure if it’s on a recent compilation, could very well be)
- Honkin’ Down The Highway (wrong edit, released on first Epic 1990 cd-release of Love You)
- Hey Little Tomboy (the longer 45-edit)
- Come Go With Me (wrong edit, released on first Epic 1990 cd-release of MIU)
- Winds Of Change (wrong edit, released on first Epic 1990 cd-release of MIU)
- Peggy Sue (wrong edit, released on first Epic 1990 cd-release of MIU)
- Lady Lynda (US 45-edit)
- Here Comes The Night DJ Reservice short version 3:25: b-side to the long single version 4:28 (ZS8 9026) (yeah I know...promo)
- Here Comes The Night DJ Reservice 12'' single short vocal version 6:44 (Caribou AA-AF 2Z8 9028, with as b-side the regular album version) (again...promo)
- Sumahama (Waves-mix (to be found on a Japanese only sampler LP: Tropical Sounds (CBS Sony YAPC 133))
- Here Comes The Night - vocal version (10:41)
- It’s A Beautiful Day – album version (on the Americathon soundtrack LP)
- It’s A Beautiful Day – 45 edit. Could be on a recent comp, but I’m not sure. Btw, it’s b-side, Sumahama, is a 45-edit. Although not mentioned, this version can be found on the compilation cd "The Brother Years (1970-86)"
- Living With A Heartache (shorter US 45-edit)
- School Days (45-edit, on promo-45 only, but also on the official but OOP Ten Years Of Harmony 2CD)
- Somewhere Near Japan radio edit (but that's a promo cd-single version)
As for solo-work
Dennis:
- Sound Of Free (45-release); Lady did have a rare cd-release not that long ago, but I forgot which V/A-comp that was...
- Pacific Ocean Blue (long OOP)
Carl:
- both solo-albums are long OOP
- several 45-edits (I think shorter edits of Heaven, Hurry Love and Hold Me exist)
Bruce:
- Pipeline (45-edit)
Mike / Celebration:
- Looking Back With Love (LP)
- Celebration Almost Summer (soundtrack LP)
- Celebration: 2nd album
- Disco Celebration (LP; although opinions differ on whether it even got an official release, but I know several people who have a copy)
Blondie Chaplin:
- Gimme More Rock ‘N’ Roll (45-edit)
- And is his first solo-album still available on CD?
And at least interesting...
The Flame:
- Another Day Like Heaven (shorter 45-edit)