That place is (was?) Audio Xpertz or something. If im not mistaken, they were actually a studio that sold Yamaha keyboards...afaik, they didnt really deal up in t violins or anything like that.That said, there's Simon's Musical Supplies on St Vincent st next to Globe Cinema. You can check them out.
....or there is a music shop on St. James Street in San Fernando cah remember the name off-hand....they hav a wide variety of instruments u'll surely get there.
dont buy the violins from simons they are no good.