I have a Nicson Engineering 2 x 1 on my '51. These were made in the late 40's / early 50's. I have seen 1 or 2 at swap meets and there was one on ebay about 6 months ago. Just keep looking. I never found headers. I built a split manifold using pieces from a car manifold (rear outlet)and a truck manifold (front outlet). I found a Knudsen aluminum head last year that I still haven't installed, but that is the only one that I've ever seen. Nobody is making new speed stuff that I know of.
