I found a video about this T-Rex Piggy Bank from "XYZ Create"
I found the template in the video description and remade it in Inventor.
The Hardware is M5x30mm Screws and M5 Nuts.
I printed without supports, cleaned up the holes with 5mm and 9mm drills.
The arms may be a tad loose, but you can glue them in. They originally had a hook to securely mount with snap fit, but that version broke immediately...
Enjoy!
I printed without supports
.2mm
drilled holes with 5mm and 9mm
The author hasn't provided the model origin yet.