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It's not going to get any better once you're round the bend, it's still 23.8mm on the vast majority of bars until it gets fatter still at the clamp. No amount of wishful thinking will make a 22.2mm flat bar lever fit that.
If you want that 2007 my first fixie look, you're going to want a crosstop style lever. You then have the problem that they're pretty much all 31.8mm clamps these days, so you can get a 31.8 bar and run them on the centre bulge or get a Profile Stoker 26 and some readily available 26.0-31.8 shims
ETA: There are still some 23.8mm crosstops available, some native and some 31.8mm with shims, but then pursuit bars tend to have a wide ferrule to accommodate tribars, so the 23.8mm section even on the rare circular cross section models puts crosstops rather close to the bend
if the lever and bar is the correct diameter, yes, but usually the bar is too wide (23.something rather than 22.2).