Congratulations on finding this super rare pin. Being that there are less than 200 pistol pokers existing, some parts are hard to find. Pinside user pinwow has some nos stuff. I have spare parts decal sets and standup targets.
The standups and ramps tend to break on this game. I suggest putting metal protectors on the ramp entrance and having a spare set of the Alvin g clear yellow standups. Also the power supply board has a fix to prevent burnt connectors.