See my posting back in Oct 11.... search for "Lugnuts from Seven" as topic.
I posted stuff they had in last catalog... including some 7/16... those were for "small" revolution holes (.625...like you sought). I find that I have 2 hole sizes across my collection of Revolution wheels... early ones are just a tad smaller than later ones, best I can reason... later ones can use either Minilite lug nuts or Revolutions... early ones, the Minilites are too big, od, to work... You can always get the 3/8 thrds. and redrill for bigger studs...
I'm a bit like Sorenson... I never found a "need" for big studs and hassle with holes in everything else..., have seen "skinny" walled ones part in two, why do it? More likely to break a spindle and loose everything.... But, I also run with what is on the car I have at the time...... if "upgraded" no reason to go back, either...
Just go back and see earlier post, or call Seven...
Bob L.