Howdy! I'm Steve Trambert. I'm a mechanical engineer working with FDM and full-color 3D printers. I tinker with 3D designs in my free time, and upload some of the successful ones here for others to download.
If you'd like to print one of my full-color models but do not have access to a 3D Systems or ZCorp color printer, you can order individual parts through a printing service. Here's one that should be able to accept the color VRML or ZPR files that I upload, although you could probably find more:
You can also get my models printed in color "sandstone" from Shapeways. They'll take the VRML files I upload.
In some of my models, I will recommend printing the part on a ProJet 4500, which produces full-color plastic parts. If you want, you can try printing them on a color plaster machines instead, but beware that the model may be very fragile.