Summary

This Galactus model doesn't have legs:
https://www.deviantart.com/ssingh511/art/Galactus-FF-809272587

I used the legs from stealth Ironman
https://www.deviantart.com/xelandis/art/Ironman-Marvel-Heroes-XNALara-1-688673538

You can pose xps and other models yourself with free software Blender with xps tool.
Maneuver a model into a game piece pose and then you can export it as stl.
Share on thingiverse.

The necessary Blender DL info is here:
https://www.deviantart.com/johnzero7/art/XPS-to-Blender-2-7x-Blender-internal-the-easy-way-489500171