Thanks everyone for the responses. I am for the record, not going to be switching the airbags themselves.
Dallas (Drac) told me after looking at an airbag unit he has that I can unclip the plastic cover with the emblem on it and switch it with mine? I will have to pull the bag out at the yard and inspect the rear of it again.
2000 Mercury Grand Marquis GS "Dewgong"