Pretty sure he signed up for an account here, but he isn't all that active.
It's a moot point anyway, as discussed already in this thread... He won't sell to just anyone.
You must be mistaken, there are only 2 custom chips on CPS1:
- CPS-A-01 on the A-board
- CPS-B-XX on the C-board
None of them has been reverse engineered as yet.