Hey Bryan,
Believe it or not I found them in a craft store called "Michaels". I think they are actually a chain store. They have just about anything and everything related to whatever kind of "crafts" you are into. It's a pretty cool store, even though the customers are 99.9 % women, and I go there every once in a while to look around and see what I might need. They also have a great supply of fake flowers, leaves, etc, stuff like that which work great as camo stencils. The check out girl looked at me kinda funny when I put all those birds on the counter, but I didn't let it bother me. :)
Jeff