Here is Superheroes busts collection ready for full color 3D printing with Tony Stark Iron Man, Loki, Thor, Professor X. Zip file contains obj and wrl with texture in png. The model were created in ZBrush, Mudbox and Photoshop.
I am attaching stl file if you would like to print them with standard materials too. Please visit product pages for more details.
If you have any questions please don't hesitate to contact me. I will respond you ASAP. I encourage you to check my other celebrity 3D models.