The smallest width I have seen with large Flair so far is 360 on the top.
But I can't tell about the quality of Ryet.
https://a.aliexpress.com/_EQVJoQFCockpits smaller than 360 are really rare. I've only seen some for road with no Flair at all or only 20mm more width in the drops. If that's acceptable there is one from Lexon . Named "Vero". They declare the width according to drop width, so 360 would be 340 on the hoods. I ordered the "380" and I can confirm that it has 360 on the hoods.
My Lexon shopping experience was not the greatest by the way.. if it was not for the geometry of the handlebar I would have sent also the second handlebar back. The first one was out of spec and couldn't be even mounted on the fork...