Thanks for all the advice lads its much appreciated
im going to bite the bullet and have a go at making one myself. I've already sourced a bike manifold and im picking it up from a local breakers, so will be making a start tomorrow
my mate has also got a manifold that looks like its off a kit car of unknown origin, maybe I can cobble them together. If the result is good, i'll post up some piccies, if its bad i'll keep them to myself lol.
Again many thanks for all the advice
Dan