I bought a used Arturis MiniLab MIDI controller. It was pretty cheap, since it had broken keys (which I thought would be an easy fix). I can (and probably will) just repair the keys it came with, but for fun I decided to model them in SketchUp.
The model is too big for my printer's bed, and I haven't decided how I want to break it up into two pieces, so I haven't printed any, yet. I originally thought I might be able to slice it into layers, use a laser-cutter to cut the layers out of acrylic, and make them that way. A set made using an SLS printer would be nice, but it would probably cost more than just buying a brand-new MiniLab...
If you need this, you already know that the MiniLab needs two of the seven-key sets, plus one extra C key (the 25th key, counting all keys from the left), plus the black keys (which I haven't modeled, since mine are still intact).
Let me know if you want the black keys modeled (especially if you'd like to show your appreciation by printing/machining a couple of sets of white ones for me ;)