hifi engine

Marantz 4415 Quadradial Receiver schematic

I have a 4415 with 1 output side down. I have rebuilt the output board, but there is an odd round diode that has a metal clamp attaching it to the output heat sink and I can't find a replacement for it. I also do not have the part number for it. I also need the original to3 output transistor numbers (they were all the same number). Can anyone help?

patrick007 coombs_1972@yahoo.com