I have started making 3D model of custom body for Fuchai 200W TC box mod. A haven't done buttons yet, but i manage to make them in next versions. This is version v.1
I don't know pretty much anything about 3D printing, so you should choose setting by yourself, sorry.
Also feel free to modify and use this project, i would really like to see how people can design this box, to make it kind of an art.