I have a brand new, never installed, still in the box, adjustable driver backrest for RT 2020 and up. Fits Comfort Seat (219400971), Heated Comfort Seat (219400972) and Heated Driver Seat (219401044).
https://can-am-shop.brp.com/on-road/...-backrest.html
219400957.jpg
$300 plus shipping from 14420 (Approximately 5-1/2 lbs)
Merry Xmas