I am wanting to fit a Sparco/Prodrive bucket seat to my P1 but don't know how they fit, ie do they come with a subframe thats 'bolt in' or will I be struggling as can't find any subframes to suit. Cheers.

You'll get them anywhere that sells the seats. Demon Tweeks etc

Thought AS would have had all the answers ;)

AFAIK, subframes aren't available. I've seen threads where folk have butchered and re-welded some, or even made 'em from scratch.

Alcazar