There is "Trains and Toy Soldiers" located in Lincoln, Nebraska, if you get the chance to get that way. They are also a forum sponsor. If you look at the ads at the top of each page, you may see their banner within the ads.
Or, "Caboose" (formerly Caboose Hobbies) in Denver, which actually may be much closer for you than Lincoln. They have LOTS of stuff in all scales. Worth a visit.
O-gauge is a somewhat sparse in my neck of the woods, too. Just have to learn to seek out train shows and/or mail order to get what you really want.
