I phoned various dealers here to get one. The answers ranged from:
- we don't fit the factory one, we use a different one
- you can only have one fitted if you order one with your truck
- been on back order for months
- we don't have any but this dealer does.
I went with the last response, called the dealer and picked one up next day.
Fitted it in a few minutes, took the trailer out today, it worked fine.
It doesn't show up on the EVIC as the truck hasn't been updated but at the moment that's not a great concern to me.
Thanks for the original post Netman66 it made the install easy.