Just to clarify, all current "standard" lenses are 1/16" thick. There are no lenses being made with 1/8" material other than the beveled lenses. Bruce at Filener (link above) can likely make ones that are 1/8" thick but there's no source yet.

I was suggesting this because more color choices are readily available for lens plastic at the 1/8" thickness. You really should drop Bruce a note to order a test lens in 1/8" thickness if you are going to modify your design to fit a thicker lens. Can you offer the thicker lens recess as an option instead? I would be willing to pay for the extra CNC time.