I got mine at a local 4 Wheel Parts store, because thats who put my tires on the rims, and the lug nuts were an unexpected purchase in that process.
They have locations all over the country.
I think I also paid $40.... Maybe $50.
I'm sure you could get them through one of the site vendors as well. It might be worth your time to contact them and see if you can get a better price and/or more selections, that's what I would do FWIW.
Do you have any idea what the part number was on the procomps? I'd prefer to get some black ones.