Thanks! I really don't have much to go on, but I figured that the forum may attract the "new" owner or someone who knows the owner.
I don't have any pics of my own, as I sold the guitar back in the '80s (once my family started) and we have had a fire that destroyed all of our pictures.
Attached is a picture off the internet of a "stock" G&L Cavalier. I purchased an extra pup, routed the body, cut the pickguard, installed the extra pickup midway between the two existing pups and wired the switch so it behaves like a 5-way strat. Imagine another pickup midway between the two existing pups.
I sold the guitar to a student, who moved to Butte, Montana and it was sold by him from Butte.