NASA has a resource page (Beta) of 3D printing models available. Along with models of spacecraft and asteroids, there are some topographical maps of planetary features.
At MCC’s Fab Lab, I was able to have a model of the Gale Crater on Mars printed.
I wanted it printed in white so I could try to paint it to look more realistic.
I used plain acrylic paints and it worked better than I anticipated.
My son is making a Gale crater at Space Center Houston. We need a 3D model like this to make the 10 foot diameter model from. How can we get one? Will you sell a copy?
Craig, I used a free file from NASA to print the Gale Crater model:
Your best bet would be to find someone locally with a 3D printer to print one off for you. If you cannot find one nearby, there are online services that would print it on demand for a good price and mail it to you. Good luck!