If you're after a cheap-fix, you can have my cobra remote-central that you can scavenge for parts or whatever.. it came with my supra, not sure if OEM, but probably about 10y.o... it has ultrasonic sensors too, plus 2 remotes, and key that fits on alarm siren in engine bay $45 the lot... email techiemark@optushome.com.au (no solenoids though, as I still need to open my doors)