HP-10 CPU (Fat chance, but…)

[[kby]]

I'm looking for a source for a working HP-10 CPU chip.

I might also be interested in the battery door (which is the same as the 19c) if there is a not too expensive spare one around. I think I have one but can't seem to find it at the moment. The CPU chip or board is more important.

As the subject says, fat chance, but it never hurts to ask.