Being picky about 25.4 and flat did limit the selection.
Nitto are mostly 26mm and/or don't accept bar end levers. And have bar drop.
Few others at 26mm from Profile that do accept bar ends and flat, no drop.
31.8 I don't like the centre butting and step down to standard diameter, tried a couple out but nope for me.
So the Somas, 25.4, flat/no drop, no stepped butted centre section, stack of sizes from 36cm - 44cm in silver or black.
I went for 40cm coming in at 296grams on my kitchen scales. A quick flex test and stiffer than the very old 38cm Sakae Road Champions that have been Chopped and flopped and are slightly bent.