I have a few of these in stock right now and they are really sturdy and reliable. $55 shipped. Www.psychotiller.com
I can vouch for this controller. Instant and reliable connection, Excellent throttle/brake control. The trim is handy for fine tuning neutral position and 2 AA lithium batteries last for months.
These are actually $30 on my site now
2 YEARS LATER And they are still the best off the shelf remote imo