My wife is German, she's in Stuttgart right now taking care of her folks.
I had her call this place to see if they had any porsche cloth for sale.
http://www.sitzklinik.de/bezuege.html#
They do.
Porsche Script cloth........1 meter by .4 meters......198 euro's, that's about $307.
Other porsche cloth is 154 euro, around $239.......... I don't think that's even enough to do ONE seat! Mein Gott!!