Hi Mark,
I got mine from Mr. B. Needs a bit of work to get it to where I want it, but it's a good start. Shell Valley is the latest owner/producer (to my knowledge) of the lineage I listed. They have info on their site, and could likely provide you and answer on the glass and misc. other items needed. The shape isn't very accurate on the main body/cab, but could be made to look real nice with a bit of rework over the rear wheels and windshield. The nose looks nice. The R&D car was the root to the gen1 FFR coupe before it was hacked to pieces to scale it, reshape it into what it became.
https://www.dropbox.com/sh/plesqk3ku...hF6nsQF4a?dl=0
The dark blue car is an NAF. I showed it for comparison... I think they have a different windshield shape and a few other things, but have never seen one first hand.