I purchased the Stull grill from AV Sport Truck in CA - I called Stull and asked for dealers, and this was one of the first names they gave me. It sounds like a small operation, but they took good care of me.
http://home.earthlink.net/~avsporttruck/
or 661-723-6464
The lower grill is a seperate piece and part #. I ordered both. The lower grill takes about 2 min. intstall - it just sits right on top of the factory mesh and is held on with 2 bolts.