The parts are designed in Art of Illusion and saved as .aoi files:
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reprap.svn.sourceforge.net]
Then they are exported from AoI as .stl (Stereolithography) files. Perhaps you can use AoI to export the part definitions in some format that your program can accept. They can export 3D as: Point of View Raytracer (.pov), 3D geometry (.obj), Virtual Reality Markup Language (.wrl) as well as .stl via plugin.
From Wikipedia:
OBJ (or .OBJ) is a geometry definition file format first developed by Wavefront Technologies for its Advanced Visualizer animation package. The file format is open and has been adopted by other 3D graphics application vendors and can be imported/exported from e-Frontier's Poser, Autodesk's Maya, Avid's Softimage|XSI, Blender, MeshLab, Misfit Model 3D, 3D Studio Max, and Rhinoceros 3D, Hexagon, Newtek Lightwave, Art of Illusion, GLC_Player etc. For the most part it is a universally accepted format.
