I suspect most people spending big dollars to upgrade wheels and tires don't want to spring for the 5th set. I did, and sold my takeoffs as a set of 5, but that seems to be the exception.
I suspect the "sissies in San Diego" are forced by local and state regs to recycle the water used at the car wash, unlike many other states. And you can imagine what mud does to their filtration systems. So given the location in a heavy regulated state, maybe they get a little slack for being...
If you need power from the mirror, use this plug-and-play harness. Plugs right into the wire harness on the back of the mirror, e-z-p-z. No wire taps or splicing or fuse taps needed. 5 minute install:
https://www.amazon.com/gp/product/B088P4VFQ7/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1...
Inside top of the painted tailgate. But I used thin rubber weatherstripping rather than tape. The product from Am-zon is linked in my earlier reply to this thread.
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I used a thin rubber weatherstrip in that spot - works perfect to eliminate the squeak. And looks factory. From amazon, $12:
https://www.amazon.com/gp/product/B0771T61VH/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
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Finally installed my slide out from www.WickedRelicsOffroad.com ; I'm impressed. This thing is heavy duty, well-made, no rattles, and slides easily. It's installed in my 2-door with rear seats removed. I have my spare (using a spare tire delete for the tailgate) strapped down on longer trips...
Well then you are in luck - here's another pic... ;)
side view:
and this is how I carry the spare when I need it on longer trips: strapped-down on a Wicked Relics Packhorse with rear seat delete: