This started off as a remix of another model, but eventually I just started over and made my own thing. It's a tricky print, and be careful when cleaning up the supports that you don't pop off the bun completely. Sized to American business card sizes, but one could modify the onshape documents to fit their needs. The 3mf is painted for a 5 channel MMU, but could easily be printed on a 4 channel system if you drop the eye color.
Here's the onshape document:
The author marked this model as their own original creation.