As far as P10 and P11 suspensions go, the only thing interchangable is the front suspension. and TEIN-wise, the only thing offered for a P10 are the S-Tech springs in soft or medium grade. Another thing I've notice about TEIN is that they don't offer the Type-NR setup anymore only the Type-NA setup for a P11. Prolly not worth getting a non-adjustable damper(NR) when the adjustable ones(NA) are only a few hundred more. I'm guessing demand is the issue here.
i_rebel - let us know how your setup turns out, in terms of ride quality, handling, likes/dislikes, the whole nine yards if possible
I'm kinda wondering how the front AGX's would do if they were installed on a P11 instead of a P10 like yours, I think I might try it out, since they do fit and I can get them for pretty cheap. Also part numbers on other front shocks (bilstein, koni) for a P10 are exactly the same for a P11, so I figure the valving in the front is exactly the same no matter what car P10 or P11. I don't know...anyways...take care and good luck.