I stumbled upon a source of butyl rubber glue for headlights. My headlights went back together well and appear to be well sealed, but I thought it might be helpful to people replacing adjusters if the headlights do not seal well on re-assembly.
2001 530i/5 S+P CDV delete/Akebono ceramic pads
M5 SSK/RedLine MTL/M5 rear sway bar/Bilstein HD
BMWCCA Member #337964