Griddle for Backyard Beast

I have the backyard beast 1200. I’ve been looking for something to reverse sear steaks and do smash burgers. I’ve used just a big cast iron skillet which works for smaller jobs. I also have the lodge griddle which is a little small. I saw the recteq brand as well but also smaller than I want.

I’m trying to find a good fit for the whole base of the grill that ideally has a drip spot on the left. I’ve seen a bunch of different options. I’m wondering if anyone has found one they recommend. Let me know!