A road going Esprit GT1, or NSX LM GT2 would be cool
This reminds me of the NSX-R GT from early builds of the first GT. Just add back the Bridgestone logos on the side skirts, pair that with the white OZ Superturismo wheels, and it's pretty much a spot on recreation.
The beta NSX-R LM has the Mugen logo banner, Bridgestone logos and a red hood emblem, and is available in black and dark blue. Which is exactly the NSX-zero RM minus all the additional decals and stuff. And the Superturismo wheels as well.
Easy peasy. The only visual change between the two is that for the retails RM they reduced the rear deck's resolution to fit the additional HONDA side decal.
I want the yellow version of the NSX TAKATA JGTC (2000)
I've had a look at how the demo replays / attract reel works in GT2 - long story short, it's literally a replay savegame minus the header.
That's the PAL version, the other regions have their own region-specific savegame. It also explains why each region has different demo videos - PD probably just ran a handful of races on each version, saved them, and copied the savegame onto the disc. Much easier than trying to convert saves between regions.
another suggestion: Bodyshop Hayashi Roadster