Spektrum has the AR500 Rx and also the AR6110, from Horizon Hobby
http://www.horizonhobby.com/Products...rodID=SPMAR500
http://www.horizonhobby.com/Products...odID=SPMAR6110
You can also purchase Orange Spektrum Compatible receivers, from Hobby King, inexpensively.
http://www.hobbyking.com/hobbyking/s...%28PREORDER%29