What about a conversion for all the Revell 1/25 L88 Corvettes, to enable accurate versions of the LeMans, Daytona, and Sebring cars from the late 60s and early 70s? Conversion would require 2 different front air dams (one for the #4 car from LeMans '72, and a smaller one for the Heinz & Johnson "Rebel" car that was 1st in class at Sebring in '72 ), round and rectangular auxiliary/fog lamps (with decals), fender flares, and wheel inserts for the front and sometimes rear wheels on the Greenwood and Heinz & Johnson cars.
Vintage Racing Miniatures makes great decals for the #1 and #3 68-69 LeMans cars, and the #4 '72 car. There are plenty of Minilite (Greenwood ) wheels are out there, just need those last few parts to recreate a ton of great American endurance racers. There are nearly as many L88 'vette variants as there are Porsche 956/962s, and plenty of low cost kits that can be used to convert into multiple cars. The Revell kits are a great base. An even more ambitious project would add an accurate roll cage and the extended chin spoiler that some Greenwood cars used in the '70s.
Kits are usually in the $10.00 range, and decals for the Greenwood Stars & Stripes (initial version) and Heinz & Johnson Rebel car are good straight from the box.
A great set of decals for the later Greenwood Stars and Stripes car (the BFG sponsored cars) are sorely needed...
I know Harold Bradford (Historic Racing Miniatures) was working on a Scarab when I last saw him at the NNL East show in '17. Not sure if that is still in the works, but it looked really good in development, and I though it was close to completion. If he finishes the project, it will be a stunner, like all of his other work.