Conversion vans for rental can be found at various used car dealers and the price depends on the size and options one needs for the van and the type of job.
A would suggest Rent-A-Center or Uhaul for you to find vans for you to rent.
One can find conversion vans through numerous trading websites, like eBay or Craiglist. One can also find conversion vans through one's local car dealer.
One can find vans for rent at your nearest major airplane location. Many car and van companies set up their businesses there so people can rent their cars and vans.
I would go with vans from rent-a-center or buy one from Enterprise.
Conversion vans can be found at most auto dealerships. Even if the dealership does not have a conversion van in stock, they would be able to find a dealership that does or have one transferred to them for purchase.
You can find the best prices for vans at rent-a-center and uhaul.
GMC still does conversion vans. If you check out www.gmcconversionvans.com you can get further information on where they might be sold and where you can find one in a city near you. You can also find prices and specifics.
Do some research on car rental stores in the area and see if they rent vans. Make some phone calls and see who can offer you the best deal for your money.
Many people do the aftermarket for high top conversion vans themselves. Body shops will also do this type of work on conversion vans.
The best place to read reviews about conversion vans would be at the following web site....townhall-talk.edmunds.com ... Conversion and Full-Sized Vans
There are few car rental companies which have large vans for rental.You can find it from either www.budget.com or www.avis.com.
You can find conversion vans for sell at several reputable dealers. You can check out www.gmcconversionvans.com for new or used models. A second place to search would be www.autotrader.com.