OMF and Champion both did conversions. I don't think either one does any longer. However, those 5 were not done by either one of those. Those were manually Tig welded and the outer weld is not continuous. Neither Champion or OMG did manual Tig. Both used spool guns with a rotator to do continuous one shot welds based on all the ones we've seen, owned, and assembled.
All the ones I know quit due to liability from idiots running them on brodozers. Beadlocks of that style are only good for low pressure 35ish psi tires. Bros were running them with load range E truck tires at 80 psi and blowing the bolts up. I had several conversations with Champion trying to get one more set done and when they said they quit, they quit.
I do not know if all the conversion companies have quit. I just know all the ones local to me have. Champion is about 10 miles or less away. OMF is 1/2 hour away.
The seller does not know what they have. When those were done, it was 150 to do one rim. That and although it was hard to tell in the pics, I believe those are 17" rims which likely makes them also 5 on 5 bolt circle.
I've only dealt with those two for conversions. No conversion is the same as a made from scratch bead lock. The big problem is welding aluminum and not heat treating it afterward. If you weld any tempered aluminum, the weld and areas next to the weld are converted to -0 non tempered condition. That makes them prone to failure if you need the strength of the tempered material and a rim certainly does.
