I've just taken the trim off my 2018 Ford Transit Custom to install a AUTO-VOX V5PRO mirror and dashcam. There was a mirror mount under the trim and the video rear view mirror fits without any issue, but the trim seems to be for use without a mirror and won't fit back on.
I'm guessing I should be looking for a replacement from a Tourneo given they'd have a rear view mirror, but I can't begin to think what to search for.
I attach a picture of the bit of trim I've taken off and how th mirror and camera is sitting.
Autovox apparently have great customer service and I've emailed to see if they have a longer adaptor that will still fit the Ford.