Replacement lens caps for Steiner Military Marine binoculars

I have had an old pair of binoculars for a long time that did not have any lens caps. Not great for keeping those lenses clean! I was never able to find them to purchase online. When I recently got access to a 3D printer, I thought it would be a good, basic first project to make.

I've printed these out using PLA and a flexible filament that I found. The PLA version works OK, but the flexible stuff is really perfect.

The rear lens caps are designed to fit over the attachment at the back o