you'll probably have more luck posting in the suspension forum
But as for springs and shocks. The springs that are available in the states for a p11 are Eibach prokits, the H&R sports and Ground Control for height adjustability. Overseas would be the Tein S.Tech and I think Apex'I has some springs also.
And for struts in the states, good luck, if you find some let me know hehe but overseas Koni and Bilstein. But Koni's are easier to obtain in the states than Bilsteins.
And for both springs and struts together as a matched combo or coilover setup are only overseas. Tein NA's, JIC SF-1's or SA-1's, and I believe LEDA also have something for us. and thats pretty much it. Expect to pay some money for these and these also require a little wait too. good luck :licker: