Another option would be a threadless to quill adapter. Then bucket loads of various road stems would be useable. Or if you were willing to swap bars over to the new 36.8 center style you could use any number of higher rise angle MTB stems.

This is what they look like. It was the first link of google that showed a picture of what they look like. It may not be the best price or where you want to shop.
http://www.bikepartsplace.com/discou...dless-adapter/

At the risk of hijacking the thread I've never understook why Nitto keeps the same sharp angle "7" shape for this whole line. After all, doesn't it make sense that anyone wanting the really LONG stems wants more rise? So why stick with the acute angle when a more open angle would provide more rise and look more in keeping with the use?