My girlfriend and I traveled through Ecuador for three weeks, but I didn't see any record stores at all.
Did you look down all the little streets? ask at the torist info places? check the phone books?
were you roughing it, or staying in swanky hotels? Sensing you had a great time in any case!
We're always roughing it. We just book our flights and never plan beforehand what we'll do between the flight there and the flight home. We stay in the cheapest hostels we can find, and do everything by foot or the cheapest type of public transport. I've had other type of holidays, where I stayed in five star hotels and all in resorts, but it's just a lot more fun this way. You really get to know the country and you come home with much better stories.
So yeah, we saw a lot of little streets.

Unfortionately, the few music stores I saw only sold copied CDs and/or ridiculously expensive American imports...