Id been looking at these on ebay too but until i get the van home i cant really design properly, plus there are already some overhead cupboards in the van and there are quite alot of them would need a few doors to match.
While you are waiting, why dont you put up a request for stuff that you might need, battery charger, water pumps etc, its amazing what people forget they have for sale, especially coming up to the X word, lol, i bet you can't wait to get started, perhaps its a good thing that you can't, you will have time to think about how you are going to tackle it, i know if it wo me, i'd be straight in and probably make loads of mistakes, but then again, i'm not as brave as you taking on such a massive project,