I second the Autoloc recommendation. I haven't yet purchased one, but
Autoloc was the only company that had all the items I wanted (power/remote
door locks, power windows, alarm, possibly shaved door kit {hey, I said
possibly}), and integrated to work together from one remote.

Sean B.
'90 V'gon, "Happy Bus"
Torrance, CA
http://home.earthlink.net/~vgonman