Did a fair amount of searching and came up empty handed. I tried: Coolster front end swap, Coolster GK 6250 front suspension swap, Polaris sportsman front suspension swap on a Coolster GK 6250, etc. I'll PM you. If it's a hassle for you, don't sweat it. I'm a ways from putting this thing together. Looks like I have more pressing issues now. It appears my swing arm is bent, or at least the rear caliper mount is tweaked. You can see in the first pic it's actually touching the frame. Also, the PO either ground the caliper to make the mounts line up, or just rode it and let the rotor do the grinding. My new caliper will no way mount up without some sort of modification of the mounts. Can't decide if I should try to fix this somehow, or just hunt down a new swing arm.
