Here are some of the promised drawings, which I drew in SolidWorks, and exported to PDF format. I've sent these out to eleven machine shops around the country, asking for quotes.
I tried using emachineshop.com's CAD program, which promises an instant quote based on your drawing, but for 1400 rods (each of which is a 14.5" x 1/4" x 1/8" steel bar with 36 holes drilled in), the instant quote came back as around a third of a million dollars. Clearly something is wrong, but I'm not in the mood to fight with their program to figure it out.
Anyway, required for the ALU are (click on each part to get the PDF):
This doesn't include the helical drive, bearings, springs, or bumps, which I can buy or machine myself.