someotherguy
+1y
Like Husk said, gank them Frito wheels! The only way I can imagine you'll find them cheap is to get some crusty ones out of a boneyard, and finding them can be a challenge. Most 1 ton step vans were 16", it was only the really heavy ones that got 19.5".
Otherwise get 'em new from Trevor or pay more to get them from Rickson's.
But, before you consider going to these you should check tire sizes, I think the smallest 19.5 you can get is a 225/70/19.5 (also happens to be one of the most common sizes) and this is a 31"~31.5" tire, size will vary a little on brand/model. I doubt you'll find a tire short enough to run on your bagged ride. Also, the TIRES ARE NOT CHEAP!!! There's some complete POS chinese tires out there you can get for around $125/ea but they wear out real fast, vibrate so bad you can't balance them, and they just suck over all. At the other end of the scale, the 245/70/19.5 Goodyears on my '98 are over $300/ea. Somewhere in the middle you'll find the General LMT200 or whatever that typical OEM tire is for probably $200/ea but they wear out kinda fast, too. I think the original ones lasted maybe 50K miles on the '07 F450SD wrecker I was driving. 19.5's should last WAY longer than that.
Richard