I'll be home at 5pm wrenching on my P5 thursday after work if you want to stop by, Evan. Phen has a heat gun and some small mallets, I'm sure you could tap it back into it's original position. My P5 has spot welds in that same location that didn't want to roll with the fender roller when I did mine this spring. Maybe it's the same spot weld for the MS3s? Regardless, we should be able to work that spot back into place.
Then hopefully we'll have a fender roller available to you in the spring for the RX8 wheels, no worries. I'll PM you my number.