Up for sale here is this used vintage heat sink for one output transistor (not included), from a Sony STR-7065. It is in good working condition and is in great shape with just light wear. This may work on other Sony equipment (I believe the STR-7055) and possibly on other brands as well. Please see my pictures for details.

US shipping and handling is $8, and international is $36. If you have any questions, please ask.

I have lots of other Sony parts and other vintage electronics listed--feel free to take a look!