I have a large quantity of custom made Collins radio lenses. These are made from polarized stock to duplicate the original. They can be easily replaced with some hand tools and cement. If your radios look like the example in the photo you can make them look brand new.
Collins 618F-1A. This was removed from an aircraft for an upgrade. Yes, the upgrade was long overdue. The exterior is in great shape considering how old it is. The knobs show wear, but the face, display, and general exterior is in good shape.
Digit simply plugs into socket on face circuit board. Item has two numbers- 3015-F and F1529011. It is my understanding that these digits are also used in the VIR 350, VHF 250, VHF 251 as well as other Collins radios.