986 3400cc supercharger

[Design]

Hi,
I'm looking for help and advice on fitting a supercharger to my 986
Very modified already, 3.2 block bored and lined to 3.4
Already been on the dyno and running 308bhp
They can get more but the stock injectors are maxing out and starts to run lean
So, where can I get the parts or a kit to fit a supercharger
Where can I get bigger injectors (what size to go for)
Can the stock dme cope with this
Only going to run max 6psi boost
Any help or advice appreciated, in based in the U.K., but will ship bits in from the USA if needed

Richard