I think that is great! Awesome job! I've seen many posts on here from people looking for parts and pieces to make their Amiga complete. Hopefully, 3D printing will help more people with those parts. Congrats!
I think the 3D printer revolution IS solving many spare parts shortage problem.
In my case, I have designed and printed replacement eject button for my A1000, I have a non original floppy drive in it, so the original button would not fit.
Printed a case for Vectrex multicart, design and print small enclosure for PS2Mouse-Amiga adapter.
And now the A3000 eject button, I remember I sold my other A3000 w/o the button, because I did not have a replacement.