Cheers Martin,
I have a brand new ATI C2 Procharger supercharger that is surplus to requirements.
Give me a shout if you are interested.
As regards a second hand supercharger kit, that would most certainly be the most cost effective route to take and do not worry about a second hand unit potentially damaging your engine as that would not be the case as it is all in the tuning and mapping.
Cheers,
Alex.