I hope you get yours soon man... I had a similar issue (no one could find it) and having heard your story I played a little tougher up front to make sure I knew where the unit was. Hoping for a PDI and wdh install Monday if not latest Tuesday and we leave on Tuesday. Talk about cutting it close.
Side note, shout out to Tadi-Brothers, ordered a camera Thursday was confident they would get it to me by Tuesday, they worked with me on shipping and will get it all here Monday!
Sorry for the additional info, but thought I would share vendors that DO work with you !
2016 Rockwood Sig. Ultra Lite 8312SS Platinum
2016 GMC Sierra 3500
Equal-i-zer 10K WDH
Tadi Brothers 9" Wireless 120 degree Rear Cam
2015 Nights Camped: 4
2016 Nights Camped: 8