The alarm system you have specified is quite old and replacement transmitters are no longer available. However, if you have an original remote that will transmit any signal (even if, say, the buttons or the case are broken), RUI may be able to make a ReMoto replacement for your part. This will require you sending us your old remote so that we can copy its signal to a new circuit board. Please call RUI at 877-719-1900 and ask for details about this option.