Hi Paul
The process for buying abroad couldn't be easier - Franz Josef at Joeressens is a member of this site and he is the man to talk to.
Go to
www.joeressen.de and you will find their site which is full of info and more important PRICES.
I don't know which dealer in the UK is nearest to you - but there is a dealer in Ambergate near Matlock, Derbyshire who carries a fair range.
You will also find an e-mail link to Franz Josef on the Joeressen site.
As for what you will need - take a 6kg red gas bottle, pre order a regulator adaptor from Franz Josef - get your van insured prior to collection (FJ will let you have the chassis number to do this)
Don't worry about the so called British spec - this is just a ploy put about by the UK dealers to justify exhorbitant prices - the door on the "wrong side" has never caused me any problems.
Don't rush back after collection - spend a couple of days over there enjoying the van.
More important - you have made an excellent choice of van that you will be justifyably proud of.