local junkyards are really the easiest. they always have them. you can also try local classefied ads, which youll probably find some really cheap if you keep looking
I think LMC may have wheels. If you jet a junkyard wheel there could be a good chance of corrosion on the wheel, and getting it sandblasted and sprayed would cost as much as a new aftermarket wheel. I have to replace three wheels on my Ranger due to corrosion from salt over the years.
Or if you really don't care i'd get a set of steel 15" wheels. The stock sized wheel on a Ranger that year was a 14". There are greater choices of tires however made for a 15" wheel. And a set of steel wheels are cheap from sites like Summit Racing. You can get a set of wheels for under $250 shipped then pick out the tire of your choice.