W2 Blower Manifolds?

I always wanted to build a W2 blower motor but there wasn't a dedicated manifold available. I remember calling BDS quite a few years ago to ask if they had one and they said, "No, but they would make one for me if I covered the R&D". That ended that discussion.

I would really like to consider a blown W5 408 for the '35 Ply coupe but of course, doing so changes all the internals and adds at least another $4-5K to it. I am torn between blowing it and running it normally aspirated. I guess it's back to the drawing board.