Hello everyone, been here lurking for sometime.  Longtime musician, short time amp  builder.  My question, I have an old Roland Cube 20 (the old orange one), it uses a TA7200P to drive the reverb.  I had it in the shop and the tech could only find one source for the chip and their minimum order was $100.  Does anyone know of a source or a substitute chip for the TA7200P.   This is a little frustrating as I google the chip number and inquired at three or four places with only one response saying it was not in stock.  Any help is greatly appreciated.  Thanks, Jim