After digging around for some mounts for the Flite Test Gremlin Andres frame, I came across the perfect answer. Hackoholic published one for TJ's frame. (Thing #thing:2311377). I started from scratch using my trusty OpenScad program. After wearing out my calipers and emptying out the coffee pot, I now have something that I think will work.
I used 100% infill and Hatchbox TPU. You would have to experiment with an infill less than 100%
Side View 20 degree camera tilt
Rear 3/4 view
RX top plate for R-XSR