MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
So, I imported the STL for the stand into OpenSCAD and just cut off the extremities. It isn't quite a pretty as yours, but should be printable on any printer with a 145mm width now. I sliced it down to 144mm wide. Maybe you could still create a prettier one though... :) I added it as a remix of your wonderful engine.