****SOLD****
I ended up modifying my oem Sport undertray to work with my Nismo front bumper. In order to use this I would have had to purchase Nismo wheel liners. It has a small crack along a corner in the middle so it's not perfect but it could easily be fixed with epoxy or ran as it is as the flaw has does not impede with mounting, function, or ground clearance.
These things are stupid expensive, so if someone wants this thing for cheap sent me $75obo plus shipping and it's yours.