lowes/home depot sells rubber pieces... Wont look as good but they have them in the pluming section. I'm sure summit or jegs will have some silicone hose that will look good that you can use.
http://www.mustangworld.com/ourpics/fcar/coldairmac2.htm
here is a link that will take you to pictures of the grommet i need. Now that I think about it, they are stock pieces. anyone know where I can find them cheaper than a dealership?
Lowe's was mentioned earlier, in the fastener aisle there should be a set of drawers wtih specialty hardware, one even devoted to automotive pieces, I found one in there, used it when I drilled a hole in my CAI tube to fit the NOS jet, take a look, they should have something that will work, sub dollar prices for them, good luck