You may want to post a "Wanted to Buy" ad on the Swap Meet forum. If you can't one, you can always build an Aleph 30. I have boards and semis. Build guide in post #1 here:
https://www.diyaudio.com/community/...or-modern-ums-chassis-builders-thread.382316/
https://www.diyaudio.com/community/...or-modern-ums-chassis-builders-thread.382316/