My manifold was made by Lovefab in the states.
http://www.lovefab.com/06/index.php?page=subCategoryListing&primary_id=18
It took a while to get made and is not on his web site, It's not perfect and needed a few little tweeks to make it fit right that I shouldn't really of had to have done, But it's all sorted now, I think if you ordered one you'd have to remind him of the issues I had, To be honest he might not even want to make another, But Protech make very good quality stuff right off the bat ;-) , So you could also try them.
It's not just a straight bolt on and drive away affair mate, They has been a lot of work what with new oil/water lines down pipe and waste gate problems to over come, I also had it braced properly.
I don't really think you need to go as extreme as me to get the results you're after mate, Stick with good quality protech or full race manifold and you wont go far wrong.
Rob