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.
Something like this. I've also used similar ones without the screw part and they work equally well. The important thing is that the part that goes into the holder has a 26mm outer diameter. It wouldn't be hard to remix the holder to fit other dimensions though.