No idea. Shop around. I think they all have online stores now. RSI is in MN (I think) so you could have their stuff within a day or two. They have bars too if you haven't picked up a set yet.
Currently I'm running a set of Fly bars (cr low), RSI 7" riser, and the powermad pivot adaptor. It's a touch taller than I'd like for trail riding, and not tall enough for mountain riding, but a good compromise. If I had a money tree out back I'd spring for the rox adjustable in the 6 - 8 version with the wrenchless levers. That way I could drop them for trail running and raise them for when we go west or run off trail all day.