got some Pace Rc36 Evo somethings (v brake only) spare that might be worth a thought. Working and holding pressure(i reckon),but could probably do with a service.
Just to mention - rebound adjuster came unglued (due to not seeming to do anything - and apparently they don't do much) but is now re-attached.
also have some rond/magura quake airs which are near immaculate and have a massive 70mm travel (colour not great tho).