Update 
Ok so i've got hold of the airbox from a 98' P11 its the GA16 one so it should fit,
i'm planning on doing this tomorrow,
is there anytihng that i need to look out for whilst i'm doing it? i know i need to make a bracket ( thanks Matthew Humphris ) to hold it down, but otherwise thats it,
but have you guys got anything else i need to make sure i do?
cheers
Tom