remote fob compatability

I have installed a Bulldog Security Deluxe 200B in my 1998 Ford Ranger. All worked fine until my fob died. (guess I dropped it too many times) Anyway, there is an FCC ID on the back of the fob - H50TR13. So I have seached the net for a new or even used fob. One comes up with the same FCC ID, but is a different manufacturer (Carbine). Can anyone tell if it is compatible with my system? Also, I did find one (correct manufacturer, but used item) on ebay (aftermarketremotes), but they are asking $80 buy it now. This seems a little excessive, since I only paid $85 for the entire system new. Does anyone know where I can get the original fob without buying a whole new system? I have seen entire systems on ebay for $40 + $15 shipping...