Help with an original eventide H910

Hi guys I have a bad h910. I got the output to work but the infamous mn5280d ic’s are bad. Chat gbt said I could possibly use MN5280N as it has a similar 4906 bit dynamic ram in a dip-22 package. Are they truly compatible? What do I do here? I’m lost cause these chips are just freaking unobtanium at this point but I don’t want to give up.

Lastly, the 10k pots are bad. Can I just use any 10k pots? Any help is appreciated!