You can order them at
www.serviceflags.com/tshirtheartmain.htm They are in the original WWI felt styles. It's where I got mine. They have a flagpole version on sale now fro $20 and if it is as nice as the window models, it's a hell of a deal. I have one on order. Also have a couple of nice T-shirt designs for Moms.
One of our idiot asshole neighbors up the street put one up with 3 stars after we put ours up. Always trying to one up with Christmas decorations, drooping stories about they upgraded their house. Too many cars to park so they rented some driveway space, etc. Maybe they liked the design, but we think the wife just had to one up us. Since they only have 2 sons and neither are in the military was a little too ostentatious for some of the other neighbors. The former Marine that lives by them asked them which of their boys was on active duty. "None, why" he told them the significance of the flag. "Oh." Still kept it up. Another neighbor asked them where their son was stationed and they only had 2 boys didn't they? It took about 3 months before they took it down.