I have a Shapeways shop where I design and make items that are useful for me. I’m willing to take requests too, or modify items to suit. I’ve also tinkered with a bit of jewellery design for personal gifts but if you have an idea I’ll take a stab at putting it into real form.
Items up there just now are BMW-fitment trim and tilt angle sensor parts (to rebuild old BMW boat outdrive angle sensors), a cubesat reference cube which shows the faces and structure of a 1U Cubesat, and there will be some more bits to come with time.
Shapeways