My left hand side door window broke a few weeks ago and I was unable to find a new one I would like to have it repaired before I move up north and store it in a storage facility you keep all the dust and debris out of it since I just recently restored the interior
You will need to find a donor car to get the glass. Any 2 door will fit but be aware sometime around the change to the 1975 models the mounting holes in the glass changed. So find a donor from 70-74 and you will be OK. Glass came as clear or Sun-X tint. Put an ad in the "wanted" classified forum - lots of parts cars out on the west coast.
I replaced all glass in my 75 with Lexan for weight reduction. So if time is a issue for you maybe that could be a quick fix . Had my door windows done so they roll up n down , I just want it for when caught in rain when driving n when on trailer