Woah...? Which chop shop? Man... i think sooner or later even ICErs go to chop shop to look for ICE. Haha! :D
Anyway, i think it depends la... like you said, some shops don't know shit, so they'll just sell it as regular speakers. The *only* "expensive" audio stuff over there are the Double-DIN and those 3-way speaker in a box like those used in Kancils.