Need help getting a part...engine rock guard under car...

[porsche_virus]

I can't seem to find this anywhere on the net. I am missing the lower rock guard from underneath the front of the car. It keeps rocks and sand from entering the belt area and I think it's made of plastic/cardboard. The car didn't come with it, and my friend has a 325 without one as well, so I'm guessing it breaks and comes off fairly easily. My belts or pullies are starting to squeak so I'm thinking too much crap has made it's way into the engine compartment and I'd like to get this OEM part back on the car. If you have a resource for this part it would be greatly appreciated.

Thanks.