With regard to my Evora, I tried to go with Crutchfield as well. They informed me that they didn’t have enough research done for my car model, so they couldn’t help me. They weren’t able to make a harness between an AVIC-X940BT and an AVIC-W8400NEX, where the X940BT was the stock unit. Pretty much, if the car came with an ‘aftermarket’ radio as stock, they can’t help with making a jumper harness.i recently installed a double din with back up camera in my daughters old VW Jetta.
I worked with Crutchfield. They were great to deal with and supplied a custom harness that plugged into the car and into the new head unit. They also supplied an adapter face plate so the head unit snapped into the stock hole - looks factory, quick and easy.
My dealings made me think they could custom do about anything. I bet if you sent them a picture of the plug they would try to source it and build the adapter harness for you. Very service oriented.
Also pricing was ridiculously reasonable.