3D Software that will map to a 2D Plane for printing on Hydrographic film

[studebaker]

I have a customer that wants me to map his 3D model to a 2D plane so that I can print that layout on my 2D Hydrographic film so he can dip/apply it to his 3D prints. My max print area is 4 ft x 8 ft.

He is beginning to print 3D models of his Duck Decoys, and he saw this video on youtube (video below) and wants me to print film specifically for his decoys. He is a regular hydrographic film customer and I want to do everything I can do to make him happy. Normally I just print a generic feather patterns for him and he fills in the other areas with airbrushing.

So, the question is, Does anybody know of a software that will "Flatten" a 3D model? The 3D models he sent me are .stl and .blender formats.