Yep, its a stull billet grill. When I used to be a vendor selling stuff I got mine from the wholesale division of stillen. However, they don't stock them. I had to drive all the way out to Stull and pick mine up. I bought the shell and grille together. I am not sure if they sell just the shell alone.
I do bodywork for a living, and I use a material called Duramix for things like that. It works real good, it is the same stuff my body kit was held on with. When I get done with the roof I will use it to mold my kit on with