You might be able to employ a 3D printer to make a sitar bridge for a guitar if you used the right material. Nylon might do, as Gibson used nylon for T-O-M saddles for a while.

I wouldn't worry too much about having precise intonation on a sitar-style bridge as the string contact with the sloped part of the bridge is certainly going to confuse things with regards to the active string length. I'm guessing that you probably have to have the actual bridge part set back a bit further than normal to compensate for this.