Cool story, I did the same when I got my bus, I managed to track the name of the previous owner of 26 years on some of the paperwork that came with the van, there was also the initials CGC painted on the back of the bus. Sadly I found her in the obituaries and that she died in March 2012, and had her own business Celtic Garden Ceramics. However one of the names in the obituary article matched the name on the the last registered keeper document. After some searching I found them on Facebook and dropped them a message. This is the reply I got, and we have kept in touch since.
Penelope didn't use the bus in her business particularly. She just loved driving it around town, mostly in the summers. She loved to see people smile and wave when they saw it. She was a 60's hippie at heart in the disguise of a 60+ year old working woman. She named everything. The bus' name was Lurch, primarily because of the stick shift. We did a couple of camping trips--one to the Olympic Peninsula years ago. But not much trips other than that. Penelope really was a stay at home girl. If some of the receipts date to 1986, that must have been about when she bought it. I don't know anything about the previous owner. She saw the van with a for sale sign parked in SE Eugene. She did drive it in a classic car cruise in Eugene a number of years ago--probably in the early 90's. She won some sort of prize--something like best foreign car in the show. And I think we may have taken it once out to the Eugene Country Fair--also maybe early 90's. I don't remember the scratch down the side. It didn't have a functioning radio in it. I put a new radio in it when she first bought it. And the linkage for the heater that diverts hot air into the vehicle never worked. I've crawled under it many times to wire it open in winter, and to unwire it to let it drop into the shut position. It sounds like you have some great plans for it. I'm glad someone else will get great pleasure out of owning it. The woman in Corvallis was excited about buying it. And there was a brother or brother-in-law that was going to help her fix it up. I suspect that's the piece that fell apart. You'll have to replace the gaskets around the windows. They all leak anymore. She got to where she tarped it in the winter. I assume you are not in the UK now. Am I likely to see you somewhere up ad down the I-5 corridor?