I was speaking with Christian (EMD F7A) early in January 2015. He has acquired a 3D printer and has already tried it out on a slightly updated version of this 1:200 Goldhofer tug. The image looks promising.
IF you wish to follow up with him, PM me and I'll pass along his email if you don't already have it. I haven't seen him publicly post it here, so I'll respect his wishes and not do so either.
Regardless, the tug I built 4 years ago is STILL at the center of my collection.