3D Models?

I was wondering if anybody knew how to download the 3D models for champions. I've been getting into 3D printing here recently and would like to print some of the champions but I don't know where to go to download the model so I can put it into the program. I've already checked tinkercad and thingiverse but they don't have the updated visuals of each champion. If anyone has any answers, it would be greatly appreciated.

Thanks, Resident Feeder