Good luck chap sadly i cant help you but a call to Alan at V-worx might just sort you out he may konow off soemthing if Gareths one is no good for you [will find his no bottom right off our front page a very helpfull guy]
Good cause this guys if anyone sees a suitable candidate please post it for Ratty
Ps Ratty any T4 can be adapted to take seats using cheaply avaialable [£100] Mazda Bongo seats which all come with inbuilt 3 point seat belts so long as mounted correctly will be fine [see dubman daves blog in our blogfs eection for step by step if required] which should allow more scope possibly rather than only seeking a Caravelle !!!