Is it a beanie with a bill on it?If it is I got a few from ebay and I think Cabelas has some.Dan Pierce outdoor shop may have them also.If you don't find one let me know so I can check next time I go there.
The couple I bought from ebay are not a popular camo but they are Scent-Lok if either even matters.I love those hats because they keep your head warm and are very comfortable.
Ok- I have that exact hat and was looking for a new one. The had was made for Walls by Reliable of Milwaukee. I emailed Reliable and they said that they no longer make that hat, and the only way you would find it is in either a knit cap with the brim, or some out of the way retailer that might have one left.
If I find one, I'll see if they have 2, cause I'm getting one of them lol