I'm glad you like my car guys

i too got bit by the bug when i saw one!
I agree with pete the best way to go is get a 10T from ebay theres a uk one on there atm, however in the states for a donor truck you'll be looking to pay bout 30-40 quid which will give you a very very good base to start. I thnk people have gone down the T2 route and have achieved results but i think it has been a long job with a lot of modding.
As you said you can grab all the seperate parts, but the dealers on ebay break cheap runners and sell them at a stupid price.
Something like this would be perfect
http://www.ebay.com/itm/Vintage-Team...item3a6b72fc5c
Alot of the sellers dont advertise selling to the uk, but in my experience after a nice message they they normally will.
If you get a donor truck anything you dont use i'll buy of you anyway, i'm a sucker for vintage associated