Got mine by looking on e-bay and found a dealer in northern OH that buys former Netflix vans from OK and TX, all expertly maintained by Penske Leasing. He had a passel of them, both gas and diesel, but haven't seen him selling any of late. I couldn't be happier with mine, a GMC diesel long wb. Had to add a spare rim and tire, but everything else was golden.
Point is, poke around, look online and off (e-bay, Auto-Trader, etc, even craigslist, etc) and the right one for you will pop up.