As obiwan stated, you def will have better luck on the AL forum but maybe these will help.
If you are after true screen accuracy, then you may be a bit disappointed. WY Colonists/employees are pretty standard.
Jumpsuits, lab coats and "work shirts". Not much there to let people know your relation to the source material besides Weyland Yutani patches.
I assume you don't want to go WY "PMC/Commando", but Weyland-Yutani scientists could be fun? Little more to work with possibly, but without a facehugger or copious WY patches, it still may not be instantly recognizable to anyone who isn't obsessed with the source material