I have never seen these available, finished, from a commercial vendor, but they don't look that hard to fabricate, once you have the flanges. The whole rationale of this piece is that it makes welding on the cast iron manifold unnecessary. Those cast iron manifolds have a well-deserved reputation for cracking, and welding on them is one way to practically guarantee that they will crack, somewhere... and then, you have a problem that can be tedious to fix....
I had the "blueprint", showing the layout and dimensions for this solution, but seem to have lost it (on my computer,) somewhere.... If I find it I will post it... PISHTA is to be commended for figuring out how to circumvent this gnatty problem!!!!
