I assume the 95 system is the non-programmable remote/keyless system like one that came out with the 1991?
If so, you can "code up" existing used remotes...it's not easy and may require excellent soldering skills, but it CAN be done. You have to take apart each remote and add/cut leads on the circuit board.
This is a situation where you have to tell us how much time and/or money you are willing to throw at the problem and your skill level.
If you are not willing to throw a decent amount of time and money at the problem: Get an aftermarket system that patches into OEM security unit...simple, quick and cheap.
If it were me I would try interfacing a new OEM keyless, followed by reviving the existing keyless.