Surefire makes a conversion head with a SSC P4 emitter, the KL5A.
http://www.batteryjunction.com/sukl5ledcohe.html
I don't believe they make a black anodized version.
If you go to OpticsHQ.com, and type "TLS" in the search box up top, there will be a "TLS TX3 Cree Q5 Turbo LED Conversion Head" that will fit when paired with the "M to C Series adapter".
There may be others I don't know about that use a Cree, but I think for the most part you'll be getting into custom modder territory and lots of $$.
The most common upgrades for Surefire Classic series lights that use the same size bezel as your 9P are the P60(same size as the P90 the 9P uses) drop-in variety, which are not conversion heads, but offer a wide variety of options at prices that are usually pretty reasonable.
There is a list up top, and searching the LED or reviews forum might help you find out more about some of them. Malkoffs are a favorite for single-level LEDs, because of their quality, and the maker posts here, plus gives uncompromising support for his products. These are what I use most of the time. I don't know much about the multi-level dropins, having only had a couple, and finding myself preferring single level lights.
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