I seriously wouldn't buy such an old van. Nor would I buy a brand new one either. Takes a bit of time and patience but vans always come up which are a couple of years old with low mileage and haven't been thrashed around by couriers. They're normally from liquidated companies so plenty around at the moment.
p.s. my cousin is a motor dealer so he searched his usual auction houses for a while, eventually the perfect contender comes up, just don't be impatient and grab the 1st one that almost fits your needs. If you strike up a good relationship with a local dealer he'll be happy to search for you until you find what you need