Indeed its tricky to source these, i am missing the correct glass on mine on the passenger side (got the chrome catch on it still though, just got horrible black metal base to it), they are very tempermental to fix as well but the loctite glass glue (halfords do it - not cheap) is brilliant as long as its in the sunlight for a good 10-12hours to harden off properly on a level surface, best bet is remove the whole assembly and clamp it whilst glued on the workbench i found...