Wheel simulators are very versatile, and don't be fooled by the amount of lugs you see. I had a set on one of my wreckers that had a ten lug pattern, but they were all fake, the whole thing got held in place with only two nuts that fit over the end of the wheel studs...this would work on any pattern of lug system as long as there were at least a pair of lugs directly opposite each other. The only other real configuration issue was size and depth.
A quick google search for "wheel simulator 22.5" 6 lug" turned up quite a few hits, including one on ebay...
You just might be a Redneck if...
...your motor home used to be a school bus!
...Your living room has a steering wheel!
...Your home has brake lights
1994 Jeep Grand Cherokee
1989 Thomas Diesel Pusher (Cat 3208/Freightliner)