I went to 1-1/8" fatbars on an extended anti vibe stem, which limited my choices, I ended up with Trail Tech Bars that did list extra control length, but they're no longer available.
So I never investigated what 7/8" bike bars list a longer control length, I think the Pro Taper website may list that info, you'll want the most "control length" available, if I remember right it's 220mm or over
found this on the Renthal website, and they do list control length, row F, measure what you have now in mm and how much more you'd think you'll need and match it up to this chart to see what bars will work for you, or just buy the longest control length available....
https://www.renthal.com/moto/handlebars/7-8-handlebars
the top bar listed on that chart is for a Raptor 660 and lists a control length of 241mm, you'll need something similar.
I'd also pay attention to measurement D, I think ATV's may require a wider area there than bikes ? worth paying attention too.
I bought 3 sets before I got it right
Who knew bars could be so technical ?