As far as I know you are not going to find any. The later wheels have the "bumps" that the cap mounts over, the early ones mount inside with clips. I purchased aftermarket wheels from Wheelsmith. There are also a number of suppliers that carry the same wheels. He also modified the caps by cutting off the inner mounting ring and welding in a smaller ring. They look great and hold tight.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine