...but not typically, gun screw sizes, unless you run across one of the few retailers that imports some and puts them on their shelves.
Suck it up, order yourself a Brownell's Catalog and wait like everyone else does.
Other than dealing with a custom tool grinder that can make petty much anything you want (for a price!) or dealing with one of the few that are importing in larger numbers (like one of the guys here that is bringing in stuff from PTG and reselling it) (win070? 070winchester?, anyway, uses a email addy that starts with reamerguy@..., boogered if I can recall it right now and the search is working as well as always for me...sorry).
KBC Tools stocks some useful stuff.
Cheers
Trev