Red Pop was one of my favorites when I was a kid!
I would contact Faygo directly through their web-site at
www.faygo.com Looks like they will sell you direct for $7.00 a case but I have no idea what the shipping would be. Keep in mind, if you had the Red Pop in long neck glass bottles, it was the original formula with real cane sugar. The canned Faygo will have HFCS but it is still good! If you call, they may also be able to tell you if they have a distributor in NE.
Tim