This is a short video showing the design process using CAD. It's not an in-depth tutorial, just a brief run through stages. If you have questions, please comment.
click above to watch
In it was a page of 'micro-props' that I liked the look of so have recreated them to be 3D printable.
Above image shows original model, insert, and my 3D drawn model. I designed it size wise to fit in palm of a hand. Or course you could scale it up or down to suit your preference.
I included in the design to accept M3 knurled brass inserts to be able to clamp the two halves together. The orange lite lens part is not included [at the moment] as this was going to be an actual LED.
This is still a work in progress, so will link file once completed.
Original design & credit goes to Lucasfilms props department.