No problem! I didn't post that link intending for you to bid; it was just so you could see the photos. There are a lot of Hess vans on ebay; you shouldn't have trouble getting one.
There is another member here, Repstock (aka Tom Ellifritt), that did an awesome conversion of one of those Hess vans into a GMC motorhome. He even robbed a Toronado of it's drivetrain to get the proper engine and front wheel drive! You should check it out; he's got some great in-progress photos:
After seeing Tom's GMC, I bought a Hess van, a Chevy van for the tail lights, and two Ford F-350 duallie's for the wheels and tires. I'm planning a similar build, but mine will be incorrect in that it will have rear wheel drive and the duallie wheels and tires in the back.