The people who use to be ARISTO still make one:
http://www.crest-electronics.net/
And they have a trackside reciever version just like their older throttles.
Sheldon
First time user, have a question about wireless DC controllers. Are there any in current production, (Aristo made one, doesn't seem to be available anymore). Not an electronics expert, looking for as close to "plug and play" as is realistic. Any help is appreciated! Thank you.