If you're struggling to find one.. it's a bit more but new
http://www.rcmart.com/catalog/radios..._id=37&sort=1a
Also I have a Spektrum Pro series module and receiver in excellent condition that is compatible if you don't already have one. I'm only selling because I bought a full used ko set after and now just need a ko reciever to save switching modules between cars. Drop me a pm if you're interested.
Chris Robinson