Imagimod lets you design your own, personalized mech and then have it printed out and sent to you.
From the campaign:
Customize your own mechs from thousands of parts, colors, and patterns, then pose and 3D print them for endless tabletop gaming!
Tired of the same old figures from your local store? Want to unleash your very own 3D printed army into the Universe?
MECH MAKER allows you to create your own, totally unique, customized mech, and 3D print it!