the not too expensive threshold has to be much higher than you may wish.
it, as you see , above, is a higher end feature. here at just short of $400.
http://www.universalcycles.com/shopp...&category=4324
Sram is showing a combination master-cylander/brifter, its in big lump in the front of the lever
body hood
the other way of putting it in the brake lever is by having Di2 type electronic shifting,
un like the mechanical brifters, that does not occupy the lever body.
just the sensor paddles behind the brake lever.
so the hydro cylander can go in there.
want lower end hydraulics ?, as you said, , consider changing to straight bars..
Volume sales numbers favor the bigger, OEM, MTB market.. and volume sales lowers costs per ..