So, after a TON of frustration, I ended up drilling out the hex bolts on my press and re-tapping the threads. Was just no way to get the old bolts out. Poor design for a caliper that is regularly caked in mud and other debris!
For a longer term fix, I am thinking of removing the mounting plates and fabricating to use calipers off of a RZR, as the disc specs are the same for the front.