I’m not sure if there is a cover for it, though the Edit does have it’s own thread here:-
https://originaltrilogy.com/topic/Rogue-One-The-Battle-of-Scarif-Fanedit/id/54567/page/1
It may also be worth PM’ing eldusto84 to see if there is a cover - or at his site, here:-
http://www.maple-films.com/rogue-one-fanedit
There are some generic Rogue One covers (and art) in here:-
https://originaltrilogy.com/topic/Rogue-One-A-Star-Wars-Story-film-and-fan-art-covers-etc/id/50710
^ maybe some that take your eye could be adapted as a cover for eldusto’s quality R1 Edit?
Good luck with it mate 😃