Intake manifold upper plenum

[feeble]

I've been working on several different intake plenum options to sit on top of a tunnel ram base. I like this one best and need a ballpark cost so that I can make some comparisons with my other options.

It is missing the front flange to bolt the throttle body to and features to bolt the two halves together but this is otherwise basically it. The assembled dimensions are approx 17-1/2 long, 9" wide and 5-1/8" tall. Here is a 3D step file: Link





Anyone care to ball park me number on what this would cost to mill out of aluminum? PM is fine.

Thanks!