Only way to separate the 2 pieces is to grind the bottom of the pivot bolt and replace....,,save enough length of the pivot bolt bottom end and brad it back again or drill the end and install small screw and washer to stop it from backing up. But I figure there is something the same size to replace the pivot bolt..nothing listed in I-and- I or Filling station . Stove bolt appears to be the same size, will mike it when I disassemble .
Also posted in VCCA chat,,,, no help.... given instructions on glass removal from frame...
;)Finally found VENT RIVET at Filling Station