I was poking around work today and found all the steel except for the tooling arm. From what i can tell it kinda looks like 1/2" flat bar used for the platen, tension/tracking arm, and the mount for the tension/tracking arm.
If this is right please let me know. I've been poking around the racks at work since i saw your youtube vid, and we have all the steel except for the 1 1/2x1 1/2 cold rolled.