Step 1: Get lenses from disposible cameras
(CAUTION there is a significant shock hazard if you plan to open a flash camera from the capacitor!)
You will need to print out a different optical tube for the Kodak lenses vs the Fujifilm lenses, STLs for both are attached in the next step. I have tested this design with the following camera models:
Fujifilm QuickSnap Outdoor
Fujifilm QuickSnap Flash
Kodak FunSaver Flash
Kodak Max Outdoor
Use some pliers or otherwise to remove the faceplate on the camera and remove the objective lens. Once again, if you plan to get it from a flash camera, be really careful with the capacitor. Non-flash cameras are trivial. Take good care not to scratch the lenses.