as far as a lever, a Dirty harry bmx lever is a really good one to try, you can get them in left or right singles from most good bmx shops, they also make a shorter lever version called the gold finger which is in gold... and is intended to be used with one finger, and look nice and neat. the also come with a hinge clamp so if you want to swap your bars about you dont have to slide in on/off
as far as a lever, a Dirty harry bmx lever is a really good one to try, you can get them in left or right singles from most good bmx shops, they also make a shorter lever version called the gold finger which is in gold... and is intended to be used with one finger, and look nice and neat. the also come with a hinge clamp so if you want to swap your bars about you dont have to slide in on/off