I have a used remote control for sale $40 (only 1 remote control). I upgraded mine to higher end with temperature sensor last year. I installed in FutureShop though.
Installation is $60/hr. Expect 1.5 - 2 hr. They will charge $50 for relay. So $90 for used part and door relay, $90 - $120 for labor
If you are interested, checkout URL below:
http://ottawa.craigslist.org/pts/276303626.html