get a new blade for the one thats broken from pbr.
you can replace the whole blade, or just cut the contact end off where it exits the bakelite, and remove the switch stack, seperate it, and slip the new blade in on top of the old one.
the two will contact each other, and you will have a new lug to solder to.
you are gonna want to service those coin switches, they need to function correctly, or no knocker, and possible other issues.