It's been done, but I'm having trouble finding links.
I know I've seen this on Thingiverse. I believe I've also seen people make negative molds on a Makerbot, use that to make a was positive, then use that to make a negative and cast from there.
The first iPods were just FireWire hard drives. There was nothing special to them. As long as you had software that could update the library file to make the thing recognize music, you could run it from Windows. I remember that there was at least 2 or 3 third party programs you could buy at a computer store to let you use your iPod on a PC.
I don't remember anyone being sued over it.
That's not entirely true. Windows CE code was available, but developers basically didn't use it much. cnet covered this at the time of launch, and in the end only around 50 games used it (out of over 700 created).
One of the Japanese launch titles, Sega Rally 2, used Windows CE, and it had a very inconsistent framerate. I believe the game was later re-released as a "native" game, which may have been the version released to the US. You can still fine some sites that mention some of the problems.
How many people who need them now don't get them because they can't afford $2k+ when they should be paying maybe $250?
I know that's the case for at least two of my relatives.
Research is what I'm doing when I don't know what I'm doing. -- Wernher von Braun