I was browsing on Tarty for a solution to this and i found quite a cheap solution in a form of a new stem: First stem This stem only offers one length (120mm) with 6 Degree rise Second Stem On the other hand this stem offers a variety of Lengths that you can pick from best to suit you style and the geometry of you bike, but again only 6 degree rise only : / Third Stem If your willing to 'splash the cash' a bit then heres another option, the shorter version of the echo SL stem has pretty much the same rise (18 degrees) as what you have on your current stem; but is also 40mm longer than your current stem. The steerer stack height on this stem for the shorter version is 38mm, so this abolishes your problem Overall all of these stems offer what you need the most; 35 - 40mm steerer stack height. This solves your problem in short, lol. Although some maybe rather more expensive than others Hope i have helped mate Jamie