What's it called and where can I get one?

You guys are the greatest! Warren, as someone said before, you have to do a book! I've had my 79SC coupe for over two years and have loved every minute of ownership. What a head turner in Petrol blue! The part I'm looking for is the rubber piece that goes between the engine mount and the bracket (arm) that the air pump is mounted on. It is about the consistency of a hockey puck and about the same thickness. It has two bolts protruding from it(one at each end). When I checked with my local Porsche Mecca (Niello Porsche, Sacramento) they told me the part was NLA. Anybody know of a source? Thanks for all the helpful stuff you folks have posted. This is my "first read" every time I sign on!!!

Try Parts Heaven in Hayward, Ca. (the bay area) they carry new and used Porsche parts.
They advertise in Excellence & Panorama.
1-800-767-7250