Do you know how to solder? If so, I can give you pix and instructions on how I did mine.
I might be convinced to do it for you. Parts & return postage would be about $10 if you supply the keychain size remote. You would have to drill out the hole for the pushbutton (a Dremel tool works best for this.)
I also thought about mounting this behind the cover that goes around the ignition switch.
