I got fingerprint scanner locks for my house but I can't find a locksmith who'll make me a spare set of fingers.
@mike check at a special effects shop I bet someone could craft a realistic dismembered finger you could put on a keyring.
@mike a serious concern even without total mutilation if you break exactly those fingers that the thing uses and they're in a cast...
@mike get a universal spare key made, I think hardware stores carry them still. Usually in the rotary tools section?
Consider this a friendly, local pub. Make yourself at home, bring your friends, have a good time! Meet new people, have a laugh, enjoy the ambience, and the Oxford commas.