I also have a set of bars with hoods that only use the front brake. The right one doesn't have a spring to keep it open. What I did was put a zip tie where the brake cable would go, then I used a second one to form a kind of L shape on the curve of the bar. After that I trimmed off the excess and put a third zip-tie around the bar to keep the whole thing in place. After wrapping the bars you don't notice the bump where the zip-ties are. The right brake stays open, doesn't vibrate, and feels like somethings there. Although, it's not wise to pull too hard on the dummy brake. It will move the zip-tie and quite possibly rip some of the bar tape.