If you need small red wigglers then you can get them at Petsmart. If you want bigger red wigglers then you can get them at Walmart. You can also get some huge night crawlers from Walmart.
My fire eels will eat anything but pellets. I get them night crawlers from Walmart, frozen krill from my LFS, and I make a mix of frozen shrimp, tilapia, and scallops. I feed them every three days.