Coker has created a line of radials for antiques and hot rods that supposedly "look" like a bias ply. It probably won't be long until they make something similar for musclecars.
"Bias-Ply Look" Radials
I'll admit they look better than most modern radials, but they still are a far cry from the real thing as far as looks go in my opinion. I think the general construction of a radial is so much different from a bias-ply that it's almost impossible to make a radial truly look the same. As long as they reproduce brand new reproduction bias tires I'm happy. Anyone doing any serious performance driving/autocrossing/etc. in an old car is likely building a pro touring style car with big wheels and isn't interested in a tall sidewall radial that looks like an original bias ply anyhow. As long as your suspension components aren't worn out the repro bias tires work just fine and look like they're supposed to.