Received the part, well packaged without damage. This is the whole air vent assembly, not just the trim rings. Unfortunately no installation instructions.
You can find DIY instuctions on the Miata forum, at https://forum.miata.net/vb/showthread.php?t=591754
I hope Mopar Online will rectify this n the future, otherwise you might as well buy them from the dealer you will be visiting anyway in the end if you aren't handyRating: [4 of 5 Stars!]