The flap that covers the passenger mirror fell into my lap the other day. A search on this BBS showed that a replacement mirror was available. Plus - it was available without the airbag warning sticker.
The part number for the new non lighted visor mirror - note this is for the mirror only:
Notice the tab - there are three others:
Slide a screw driver under the visor and release the tab:
Slide the old mirror out - wiggling the other three tabs out from under the visor:
Viola - no mirror:
Insert the new mirror - wiggling the tabs under the visor - use the screw driver if needed.
You now have a working mirror cover.