Thanks everybody for your help. I'll check into these places and see what I can find.
Brad, thanks for the part number start, and as it turns out 4-40 is by far the lowest priority and the one place I might have used them I can probably get a 6-32 to work.
Maybe I should go into McGuckins and complain about their "if we don't have it, you don't need it" slogan

.. and J.B. Saunders is always a very desperate last choice.
-- Jim