Go to your local Woodworkers Warehouse or other woodworkers supply store. All the parts you need are in the wood workers vacuum section. Most carry the Delta line. You will find real nice 4"hose and hose adapters to connect it both to your air box and to the fog light hole or front tow hook hole. If you already have the hose, the adapters are only about 10 bucks each.
Butch 02 Sierra Denali