Heater switch assembly problem

[HIGHWAY BY THE SEA]

For some reason the heater switch assemblies in BOTH my 67 GMC and my 68 C10 have developed the same problem. The front faceplate has separated from the rear switch pivotal bracket. I did not realize until today when I rebuilt the 67 one with new switches that the separated pieces were held in place with permanent rivets, and mine no longer have the flares ends to keep them together. Has anyone else had this problem, and if so how was it fixed? Very strong glue perhaps? I could not find a thread on it.