HP25C sad story, need opinions

[husmus]

A friend gave me a challenged HP25C. It had corrosion and heat exposure that apparently damaged the keyboard. The keys x,1,2,3,6,R/S don't register well, or ever in the case of the 6. Otherwise it's in great shape so I'm contemplating what to do? Find a more common HP25 keyboard from a donor calculator? Leave it alone and display it as-is, a victim of the design and lack of care? Other options? Thanks.