The Toyo R888 is available in 275/35-18 and 325/30-19. They aren't as sticky as the Hoosiers but they're more streetable than the Hoosiers. They also have more grip than extreme performance tires such as the Kumho Ecsta XS.
If I'm not mistaken, it was the first road course in the US. The car club that I'm in played a role in its revival. We've been doing autocrosses in their parking lot. They even asked us how wide it should be.
We respect the fact that your plate is full, but I think that some of us (all?) are merely fantasizing rather than telling you how to run your business. It must be flattering that we chose you to build our various dream cars.
My latest fantasy is a retro body for the SLC. Just as the SLC has...