Closest thing will be a 45mm stem due to packaging constraints of the bar/steertube intersection. As mentioned, the bike will feel really twitchy but you'll prob get used to it. A bar with a good amount of backseep will help out just as much as a shorter stem will in some cases. Either that or start stretching out your lower back every morning.

On a side note, i see these really awkwardly built up bikes day in and day out on the street, at my shop, at school, etc... I really, really hope some day all these riders that have adopted a bike as a form of transportation and in a larger sense, a lifetyle, will one day have the opportunity to build up a proper fitting bike.

I know money is an issue for many so thats why i dont bash every bike with a funny set up, be it a seat with the nose pointed down at the front hub, bars cut down so far that only half your palm fits on it, or stems so short that one knees are within an inch of the bar. I just hope that one day they will see the light.