No such thing as a dumb question! I was hoping user error myself, because user error is far simpler to fix time wise. It is unfortunately/fortunately(???) turned on and all configured correctly as confirmed by Adam at link.
Ringing round some wreckers will be the best bet. There will be heaps out there. Try @Subirex Automotive, he might still have some from the one they recently wrecked.
Not sure if any models came with blank left hand ones though.
What's the reason for wanting blank on both sides?