I believe the metal frames are removable/replaceable, so the glass can be replaced.
Tempered or laminated, the glass is the same thickness. If you decide to eliminate the metal frames, tempered glass, with a heat-treated edge is necessary, to ease the edges & prevent chipping. Either tempered or laminated, can be used with the metal frames.
The replacement door glass is available from:
www.lmctruck.comwww.classicparts.comI am not awar of any company offering the metal frames. The glass is available in clear or tempered.