PacParts may be able to get it for you. You'll need the circuit board designation, which may be under the component.
I never did see anything under that zener diode. But when I went to power the amplifier up the resistor that says 220 on the top of it went up in smoke. the board doesn't have any component location marks . with only power and ground connected no remote was ever connected. Here one pic I took from a good amp. The sex pic is the damage area from the bad amp. The components I'm not too sure they j fits but they say CCB on top. Should I replace them. In the damage amp pic they look burnt , there unreadable
Attachments
There seems to be a few possibilities, but no diode:
https://www.web-bcs.com/chips/c/chip_list_c47.php
https://www.web-bcs.com/chips/c/chip_list_c47.php