Don't be concerned about the oversize center hole. I have run the aftermarket wheels for years.
If you know someone with a trailer ( don't forget horse trailers)with 6 bolt wheels maybe you can borrow one for a day or two.
Also some older chevy half ton 4x4 wheels are the proper bolt pattern, but you might have to slightly grind the center hole if your hub has little nubbins around the edge. The weight rating may not be right but they would get you home
Rick Davis 1602 K8DOC
61 tradewind, plus a few others
13 Ram 2500 TD
99 Dodge TD 577K miles