Hey GuppyGirl, welcome to the forums! I also live in NE, probably not too far from you (I'm near York).
Sorry, I have not been living here long enough to have had time to check out all of the local LFS. You might try going to Nebraska Aquatic Supply in Omaha. I don't know if they have many shrimp, but they have some and they seem very willing to take suggestions from customers on what to stock. You can check them out on Facebook, and they have a posting on this forum as well.