Well, 2 reasons...
1) Places I've checked haven't had machine screws small enough (including Fastenal, a store that sells screws, primarily)
2) Big box retailers have basically wiped out "Mom and Pop" Hardware stores convenient to the area (Thanks, Lowes, Wal Mart, and Home Depot!!!)
I'm going to head to one in the next day or two. When I do find the answer, I'll post it here, as it doesn't seem to exist anywhere on TB or the Google universe.
50+ Basses Club #49
Sold my car - Bought a bass Club #12
Ohio Bassist #211