Round here, you can get flag decals just about everywhere and anywhere you can think of. Check it out on the net. I'm pretty sure you can google it and find tons of places to buy the decals.
The HD store in Burlington NJ had some a while back. I also saw some at Pep Boys not too long ago. And, believe it or not, we got some for a project for my kid for school at Walmart last year. I do not know if they have them still though.
You can get custom decals made and order them through EDecals.com; they have a large assortment of American flags and symbolic decals for cars and bikes. You can select sizes and colors or design one yourself. I hope this information helps.
Wow HillBill where u from? Here they are everywhere in every store any kind of Flag decal that you could ever want. Have you found any yet? Maybe we can do some searches and post them for you if you haven't ,let us know.