I actually did look at the remote control receivers for cars and boats.
Although they seem to be for brushless motors and my motor is brushed. Plus I'm not sure how to interface a small 2 button remote to it.
MarkT:
Do you have a link or something to what you are talking about? A two button remote is all I need. Like the small remotes for your car. How ever I need to support at at least 5amp.