Does anyone know where I can find some 5/8x18 lug nuts with a 60 degree seat, 1" hex, chrome w/closed end and 2" long? I have tried Gorilla, Dorman, Prestige Wheel, McGard, Summit, Jegs, Stockton Wheel, and several other smaller distributors. 

Thanks much for the info. The nuts in the first link have a 90 degree seat and won't work for me, I need a 60 degree. The ones in the second link don't specify a seat angle but appear to be correct. I also found another option, finally, in the form of a 7/8" hex with a 60 degree "bulged" seat, I ordered these before I read your message, but if they don't work I'll be trying the others.