other 40mhz recievers for ko propo
 

I'm after some cheap 40 mhz recievers, I have 2 ko fm modules one is the 401 and the other is teh 402. I know the 402 is narrow so its fussy, but my 401 module seems more forgiving. At the moment I use this module with a futaba fp-r113f receiver. I just wonder if any other futaba receivers would work ? (I need a couple more for part time runers)