Oook. I figured it involved some sort of quantity variable rather than food types. I still don't know a place where you can just buy bulk Red-backed Salamanders... You might want to check out the kingsnake.com classifieds at the top of the screen then navigate to amphibians under the US section. I don't recall that species ever being advertised there but if you post a wanted ad then you may get a response pretty quickly. Just be sure to let them know in your ad exactly what you plan on doing and someone might be able to help you.