first check to see if you can find hitec crystals to match your current frequency, or if you can find a futaba module on the same frequency as the hitec crystals you find. You may have to search ebay, rc universe and rc groups
*** EDIT ***
Just checked - I have two Futaba FP-R127DF 7 channel FM Rx, one on 19, one on 58
I have two HiTc RCD3200 7 channel FM Rx, one on 58 and one with no crystal.
Take your pick - will be happy to send one of the Futaba or both of the Hitec.
You are the best!!!! Thanks so much.