My bro had a skim board for a table in his splitty. He bought a skim board from local shop but you can find these on ebay, look for osprey skim board as these have some vw designs on £15-£30. Try b&q or just Kampers as they sell table legs to fit. I will try and get you some pics if he still has any. Or best thing to do is go to any vw show as these are very popular in panel vans and check out how they have done it !!
Hope this helps.