Heart can be rotated in the frame.
I sliced STL file in 20% of original size. If you can't use project file of Prusaslicer or gcode for Mini+, please downsize it on your environment.
Earing fitting can be get in handcraft store.
Mines can be found in the shop;
https://www.partsclub.jp/store/k~3B/3B0A
Sorry in Japanese.
The author hasn't provided the model origin yet.