The figure 8 bend ones was what I was referring to..

an example :http://www.sjscycles.co.uk/bbb-multi...ver-prod28913/
from same source , cheaper yet,
http://www.sjscycles.co.uk/humpert-c...ver-prod28188/

difference as the lower picture shows better, is the forward bend, right out of the stem.

that puts the side at where the end of straight bar is,
reaching the forward grip gets the headwind tuck,
The control levers go on the inside rear
open end, so combined with an open face stem you can swap bars
without disturbing the tape job.

I've double layered my padded tape. ..

I have 2 made by ITM, of Italy. for Koga Miyata, in '04~ '08
1 resembles the Humpert,
the other was 3 parts, 2 D shaped 'wings',
and an H shaped yoke that clamped the wing tubes,
and was in turn clamped by the stem.


the ones you show just have 1 larger radius bend.. out past where the grips and controls go,
so the tape or grip sleeves, have to come off to swap the bars, as you found out.