Except in Florida and California, and a few in Canal Street in NYC, there are no retail stores except Radio Shack. You can also find some useful parts in the electrical section of Lowes or Home Depot.
Do not buy gear from Radio Shack! If you are in a pinch for a fuse, hook up wire, solder, solder wick etc., and cannot wait for Amazon or any online seller, RS is your only solution, at least we still have them.