What model raybans did the Apollo astronauts get issued?
The Apollo astronauts actually wore the Flight Goggle Model 58 by American Optical, not Ray Bans.
Is an AD issued at the aircraft model level or can the AD be issued to a specific module on the aircraft?
Yes, every new soldier in the Swiss army has a knife as part of his kit. This is how the Swiss Army Knife started out. The model issued has been updated regularly. The latest model, issued since 2008, is the "Soldatenmesser 08" (google it). It is not red. This model is also sold to the public (in Switzerland but not in the UK) and costs CHF 44.