hifi engine

Looking for (dead) audio devices with old transistors: SC2291, SC1583F, SC536F

Hi,

I’m looking up things on this site for scavenging parts from old stereo equipment (preferably dead units, or uninteresting working units) for repairing some old musical instruments that require certain specs (ie SC536F, but a SC536G wouldn’t sound right).

Anyone have any manuals that have any of the following transistors and/or IC’s?:

SC2291F
SC1583F
2SK30-O
2SK30-Y
LA4140 (headphone amp IC)

Thanks!