Update as of yesterday night. Spoke at length with my rep over at NRG. Basically according to Kris' measurements, the 47.5" harness bar they make will fit, but it will require custom fabrication at the mounting hardware to work. you'll need to pull trim, remove the seatbelt mounts and attach it there. The problem is that those are 10MM bolts, and hanging on thing metal. That's not safe for a harness bar, so you'll need to make/weld a plate onto it to make it truly sound for it to work. Because of the weak hold there, they will not market or advertise it as a harness bar and won't give me one to test because of the liability if anyone gets hurt. They said it'd probably work with the plate, but we'd need to buy a bar and test it and make that plate. Kris said he might try to make one on his own and I'll see if any others can help.
mitch