I'm not sure if they make a set for the p10, but they do have a set for the p11 for sure...but from what I know they are one of the best for quality, adjustability, performance and ride quality in terms of coil-overs(sleeves). Installation is just like putting on regular lowering springs, fairly simple. I say a good 2-4 hours, 2 if you've done it before and 4 if your kinda new at it. As for price and availability, you might wanna contact them direct, they can tell you more, you can get custom spring rates and everything, just tell them what you want, what you want your car to be able to do, and they'll give their best opinion...good luck.
www.ground-control.com (530) 677-8600