wheel nut source needed for unusual type

[Tom Martinez]

I'm hoping someone recognizes the type of wheel nuts I need and can give me a lead to where I can find replacements. They are for a 1931 Lincoln model K, probably typical to 1932-1933 KA and KB also. Perhaps other cars used the same type?

The seat cone is about 45 degrees and 1.100" in diameter, the thread looks like 3/4-16, the overall length is 1.04" and the hex is .85"

I'm looking for at least (30) new ones and I'd rather not visit the machine shop.

Thanks and regards from So. Cal.