Well after much Ebay watching I have found a replacement.
1990, RHD, 2.1 petrol Syncro hightop. Looks like it has working difflock(s?) and a homemade interior but from the description it seems in pretty good shape (time and inspection will tell).
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 0751802172
Perhaps it belongs to someone on here? It was not listed with Syncro in the title so wouldn't have shown up when you use the term. I think I *may* have bagged another bargain bus

I'm going into this Syncro minded so I will be budgeting for drivetrain refurb/replacements as I did with the last van. This time, however I will be making it more secure and it will be parked on off-road parking.
More info and pics when I have it in my possession