Hey Rocky,
I think I have ordered the ones I need. I need #4's that are 1 1/2" in length (and black) - most that I found are 1 1/3" or 1 1/4". The pickups are Dimarzio Ultra Jazz but I think these screws that I need are regarded as "soapbox" pickup style screws. My bass is a MiM Jazz. Anyway, I think I'm good.
-Scot