I'm looking for a working Narco 810 Com with a display I can read, or a replacement display for the same unit.

Also, if anyone has a source for a new display I'd be open to that as well. None of the vendors I've found have them, and the company that makes them advised they're discontinued.

I replaced the display in my Com 810 TSO back in 2018 with a unit from Digi-Key, p/n 541-1411-ND.
It cost $135 at the time.
That lasted about 2-1/2 years, then the new display went gunnysack.
Digi-Key had discontinued those displays, so I took it to an avionics shop.
The guy there was able to (eventually) find a replacement display on ebay.
In the meantime, I bought a used Com 810 TSO from someone who'd upgraded to something newer.
Some would say that was throwing good money after bad, but now my radio works fine and I've got a spare for if & when it fails.
And for way less money & downtime than upgrading to a newer Garmin or whatever com radio would have been.

I did a quick google & I see several used Com 810 TSO radios are listed for sale.
Be aware that the Com 810 TSO is different from the Com 810+, I'm pretty sure they're not interchangeable.