high planes, i have a kraft single stick radio that i've grafted a futaba skysport into. had some trouble with the potentiometers being different but ultimately resolved it by using modified servos. it's an easy transplant and seems like it's going to work well. if you're at all able to solder, i'm sure you could make one yourself off an ebay $50 antique. servos have to be modified so that the signal is amplified, otherwise it will only sweep about a 15 degree arc.

try it... i mean everyone has a cheap 4 channel lying around!