First of all, Channel Cats are easy to find in almost any lfs in the US. They are cheap and you can find them in Blue or Albino, very common, and around $5. The other native fish you seek may be obtained from Jonahsaquarium.com DO NOT ASK A GAME WARDEN to get you some, don't ask any governmental wildlife officer anything about keeping native fish. There are a bunch of laws in the US about this and there are enough pricks out there looking to make your life miserable without giving them reason. Oh, one thing to remember is that Channel Cats can hit 4 feet plus, might wanna look at a Bullhead instead??? Good luck, native fish are cool.