FWIW - I have a rear bumper skid that bolts on underneath that is not a cut, just a bolt on option. Works well. Could easily be modified for more corner clearance. I did it this way so I could just drop it off when I'm not going wheeling. Requires 6 bolts. Basically it bolts on exactly how the heavy duty trailer hitch assemblies go on - using the same hardware and mounting points. I've had a few folks ask about producing them, but I've never really been serious about it. If I had some free time I could probably draw up the DXF files. I think there's a market for someone to replicate it. The only trick is that the frame has a weld bead down the middle, so you need to work around it. You can see the funky cutout of the mounting flange area on the GX460 class 3 hitch. It's made that way so it doesn't sit on the frame welds.
I've done a fair amount of "testing" and it's held up well.