Regarding brake levers for Joako, for some reason I've found that short pull levers actually work fine for me with the stock V-brakes. I put some drops on with Cane Creek road levers last week just to try it out, and it's a bit finnicky to set up but otherwise fine.

My point being, I bet you can get away with using bar-end levers, which are probably a good match for your bars. Here's an example, although you may be able to go cheaper elsewhere: http://www.velo-orange.com/siinbrle.html