http://weirtech.ca/pdf/catalog-1.pdf This is a local guy (to me), and I've bought a couple from him for $20.
I've built one for my self, but will be working on another one in the next couple months as I have a couple cracks that just keep forming. If their is enough interest for a pre fabbed manifold for a T25, I've already talked to the Mr. Weir and he's willing to use my car as a mock up, but he'd need a good amount of interest.