Standard TTL 74XXX is drying up rather quickly.
Futurlec still has some
TTL but 7404s are all gone. Even LS is hard to find.
Ours comes from Mouser, between two part #s they have over 7,000 74LS04s in DIP packaging
in stock. Didn't check ACT, HCT, or ALS. I don't think we've had a 7400 series
part that we couldn't just order off Mouser in recent history, and we're usually
buying QTY 100.
Thanks,
Jonathan