Use the following links to search for free 3D files (.stl files) to print or modify using 3D design software.
The NIH 3D Print Exchange provides models in formats that are readily compatible with 3D printers, and offers a unique set of tools to create and share 3D-printable models related to biomedical science.
A large archive of various 3D files available for download
Medical images that can be combined and converted to printable objects.
Share files with your colleagues at FBRI