I have two widow makers on my truck, I'd really like to get rid of them as well. Might be one or two shops in the entire county that will even take them apart so I can put my tires on better wheels, nevermind change/patch the tires.

I was looking around and couldn't find the info agian, but I was looking before and there is one company that makes the 6-bolt 20" rims. They only have two hand holes in them, but they are new tubeless type wheels. Typicaly used on street sweepers it seems, hitting up your local truck tire shops or farm equipment stores would be the best bet.

1956 GMC 370 dump " 'Tater "
1970 VW Volksrod "the Black Bomber"
2007 Chevy Avalanche
2020 Jeep Cherokee Trailhawk,
2005 Harley Davidson FLHTCUI

I dig all cars, old and new, whether they were hammered out of American iron, German steel, or Japanese tin cans. Being unable to appreciate them all is missing out on a world of great things.
But thats just MY opinion! :P