Thanks for the replies; got me thinking more:
Fred: Yes i have compared both briefly. I stripped a 130 bus out a few months ago for parts and it was identical to my Mk2 except for the drivers door. I think the hinge location and striker plate areas are going to be no problem, why would they be. Only if say the captive threads were missing from down in the hinge locations. I'll take one of the blanking plates of mine when the suns out soon and have a look.

p.s. no its not just you

pps pics on way.
Mark: Yes you have touched on the areas i thought might be problems the sill edge and the runner areas. One of my main problems with it is my upper runner hood thing is rotten and i cant see a satis way of fixing it. Cutting it off seems like a solution!

You are absolutely right though - on the 2 or 3 days its really hot in the summer sliding doors are the best form of air conditioning you can get but i feel sure i,m not supposed to have it open a bit at 50mph on the A10!! Still, I haven't seen any traffic police for a few years now!!!!!!!!!
Luke: Because whenever i go on the motorway(lord forbid a bumpy one) the rattly, noisy, draughty, banging, clattering, wobbling, vibrating, clanging, windy excuse for a door really annoys me and i lack the experience to know how to fix this kind of door. If i could only make it a tight fit and the runners had nice modern close tolerances and the striker pin/hook wasnt getting worn and i could get parts for the sliding window which i also dont care for since i gave up smoking!!!!!!
Geoff: Yep if you meant me i'll get back to you this summer when i've got everything out in the yard and start cutting the wings off.