Seeking HP9810A parts

[aj04062]

Specifically need the RAM box (modular box of cards on left). I have a nicely restored machine (yes card reader and printer works) and I’ve narrowed down the fault to these cards.

I have a 9820 and 9830B for parts if your need some swapping, but I’d prefer paying for the boards.

Or if you have a set, could I borrow to narrow down the specific faulty board?

Thanks!
Adam