2007 Avenger 8x8 with 30 hrs

[Hog Rush]

Picked up a nice ARGO 8x8. Not much use.
Kohler command 26hp carb engine
Brakes are sticking and carb needs cleaned.
Before I replace calipers, is there a conversion kit to a
More available caliper?

I had seen something about a G.M. caliper conversion bracket but didn’t see much info on it.

Thanks