3d Model from PSD or AI file

I have a scanned in image in Photoshop format that I need to be converted into a 3d model in one of the following file formats: STL, X3D, Collada or VRML. Ultimately, I will be uploading this design to Shapeways.com. The image is black and white. The black will be approx 1/4" thick, the white will be cut out. The entire model should be approx. 6" width by 8" high, or close to that. I also have an Illustrator file, which I generated from the Photoshop file. The idea was to import the Illustrator file into Maya, however, the Illustrator file failed to load. I believe this is because the Illustrator file has too many paths. Feel free to smooth out the curves of the Illustrator document. I will be providing both the PSD and AI files to winning bidders. Keep in mind this is scanned image from a drawing so it may be a little tough to get smooth.