Chris,
Maybe save yourself some trouble and check the McMaster Carr book. Or website. Check this link:
http://www.mcmaster.com/#brass-machine-screws/=lcyyp
They have the sizes your after as well as many others in several different head styles.
MicroMark has a good selection as well:
http://www.micromark.com/hardware.html
I've found them to be a bit more expensive than McMaster Carr but they carry some items the other doesn't.
YMMV,
pk
Maybe save yourself some trouble and check the McMaster Carr book. Or website. Check this link:
http://www.mcmaster.com/#brass-machine-screws/=lcyyp
They have the sizes your after as well as many others in several different head styles.
MicroMark has a good selection as well:
http://www.micromark.com/hardware.html
I've found them to be a bit more expensive than McMaster Carr but they carry some items the other doesn't.
YMMV,
pk