jak,

Look at the receiver in the GWS foamy. It may work with the Futaba 6-channel FM transmitter.

Post the model number on the receiver, and look for a small round sticker with an "F" or "J" on it. F is good, means it'll work, and all you need is a channel 27 crystal ($8). J is bad, means its for a JR or Airtronics transmitter.