What mounting parts? I'm assuming you're talking about the screws for the cleats, and possibly, the 3 bolt shoe adapter.
Just buy a set of cleats, and you're good (they come with the 3 bolt adapter). You'll have to replace the cleats sometime anyway, and you'll have a backup.
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You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.