Don't know if you still going to check back.
how about a new synthesized receiver, with no crystal headache. Works with Futaba and JR transmitter.
https://www.ebay.com/itm/Corona-RP8D....m46890.l49292
All receiver you can find now are used [20+ years old], conditions unknown, hard to finding a matching crystal. Futaba still stock some of them.
If you are in to antique and patina (oxidation), we could talk. PM me.