Dennis,
Believe it or not, the spash guard came off of ebay...There was a guy selling them there for a while a year or so ago. This one is severely cut and modified from when I bought it...So much so that it would have been easier to start from scratch and make it myself.

If you are serious about it I can try and make a template for you. It's pretty run of the mill 1/16" aluminum and is made up of two pieces welded together. We had ours painted with the car so it blends in nicely but still serves a function and looks good. Butch Capps has one on his car too that is polished.