I came across the “Prusa Gargoyle” model by Scott Vachalek, reposted here by AndreiVN. When I printed it, the mount was very loose and the figure didn't sit flat on the frame, so I went back to the original “Gargoyle” model by Trevor Robinson and designed a new mount.
I printed this using the new organic supports in PrusaSlicer 2.6, but it works OK with Grid-style supports as well.
Enjoy!
Update: Added STL file for people who don't have PrusaSlicer.
The author remixed this model.