Hi there, I've tried looking around myself, and cannot find a solution.
My problem is that after being accustomed to Elv Ui and the arena / BG frames built into the UI, I am struggling to find an addon that does something similar, now that I am no longer using Elv Ui.
I used to used Gladius prior to using Elv Ui, but remember that it was very problematic for me (in terms of showing up when I didn't want it to and having to tinker with it a lot)
I have looked at Sync frames and sArena, but I don't like the look of either of them, though they do provide the functionality I am looking for.
If anyone has something better and can share their knowledge, I would greatly appreciate it!