I posted this response on the Rennlist Turbo board.
If you follow the links to the DP site and read the company history it says: Managing director and founder of the company is Dave Perry.
Even though the company is called DP Motorsport, it's based in England. Not the same company as DP Motorsport in Germany founded by E. Zimmerman, who designed and made the bodywork for Kremer, and started doing the street car conversions. To what capacity this company did the conversion, who knows. Were they a DP dealer/importer, or they just bought all the conversion pieces is hard to say. The DP cars cost over $100k (U.S.) when new.
This is not meant to take anything away from the car, cause it's a very cool car on it's own merit. The ultimate Targa in my opinion. One I would really like to have, but can't afford.
Good catch on the intercooler, stock with a sticker is right. I have a few pictures of DP intercoolers on my site.