There is a NEW MK4 Bread Wagon J-19. There where two "Breadwagon" MK4s made. One was destroyed in a crash and the other in structural testing. Now there is a brand new one. Built from scratch from plans by Kenny Thompson in Denver NC. It is J-19. This is one of 6 scratch built MK4s built by...
www.gt40s.com
I wondered the same thing as you. I had a bunch of useless searches until I added “bread wagon” and the site above popped up. Several good posts.
“use an OEM Corvette bearing hub assembly.
A. This has bigger and stronger 12 MM studs. They are larger than the original 7/16" studs.
B. Use your original Corvette rotor, just drill the stud holes out to 1/2" for a perfect fit.
C. Your original aluminum Corvette rim fits perfectly after we provide you with the correct 12 MM lug nuts. D. Your original brake caliper bolts on, along with the stock brake hose.
E. If your wheel bearing should ever fail it is readily available.
3. Racevette uses a premier USA axle manufacturer who provides us with a top quality axle.
A. We designed this part to slip in for easy bearing replacement if ever needed.
B. It bolts to the existing Corvette drive flange.
C. You utilize your original half shafts. ”
Hmmm, I’m not a lawyer, but Duntov says they are the only ones licensed by GM to build these. Superformance gets their license from an agreement with Duntov is what I read somewhere. Now a Dutch company is building them.