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This is your clue:

New: Scalable Vector Mask Artwork for Museum-sized Exhibits

My guess is that you have to license it from them.

The drawing is undergoing verification. When it's been verified it'll be posted on the download page: http://www.4004.com/#downloads

Very cool. My plan is to use it to make a 4004 out of acrylic :-) (probably 36 " x 35" )