And just like that, there's your windshield frame! Use the parts you need for your first one, taken from the 2nd. When your 1st one is all restored, part out the rest of the 2nd to others that need spare parts for theirs.
Unfortunately, such is the nature of a lot of hobbies involving old things - once the stashes of new or used spare parts run out, the only way you can keep things running is by sacrificing the lesser-condition ones to keep the better-condition ones working. Hopefully the technology of 3D metal fabrication will catch up to us soon, and we can fab whatever we need to easily, including new frames, engine blocks and axle assemblies.