Dave, I just got some from Toolup.com. I don't know which gun you have. I use the 8 oz cartridges http://www.toolup.com/ITW-Ramset-Red-Head-A7-8-epcon-Epcon-A7-8-Fl-Oz-Cartridge
The 10 oz ones work in a regular caulking gun, but they don't work as well and are more expensive. Both sizes use the same nozzles. I'd go with Bolt Products SS glue-ins instead of the galvanized ones we used to use. Get in touch with Dave Quinn and he should be able to get them for you and they are only a little more than the galvanized ones. I like the heavier 8mm ones (Breaking Strain-76kN, 5/8" holes) rather than the 6mm (Breaking Strain-40kN, 1/2" holes) so they don't look so much like coat hanger wire even though the 6mm ones are very strong. They are like thicker Wave bolts but they are twisted where they go into the rock. If Dave is traveling and can't get them to you right away, I can spare 6 until he can get more. Give me a shout.