further update.....
I have been driving my van here and there to keep it running sweetly, and it attracts a lot of attention wherever we go. People I have spoken to who were into the van scene in a big way in the 70's can remember the the trim being an option, and there was even one bloke (who grew up in Cronulla, NSW) said he could recall other colour variations like purple and green. I have since established it may be a fabric called habitat upholstery covering, but close examination also suggests it may be a weave, although many who have examined it say it is a print. any one out there got a spark of memory? I will try to get some very high res. pictures up as soon as possible.