Those where built for the Trek Competition. You can’t walk into a dealer and order one.
https://www.landroverusa.com/experiences/events-and-sponsorships/trek-off-road-competition.html
1 / 2 shows the order of operations.
First you slow down to less than 5 mph put trans in neutral.
Second operation is move the transfer case lever to low or high depending on conditions.
Left is diff lock. Right is transfer case open. Yes high and low in each.
That’s been for sale FOR EVER. I honestly don’t think he actually wants to get rid of it. The first time I saw it was at a car show in Daytona 2012ish and he was asking less then 20k. It’s been posted on this site before too...