Great choice on the Gunnar. I have a Gunnar Crosshairs as my "adventure" bike. Great bike. You like the Sport?

You could always just buy the long version and then cut it off. Just transfer the max height line to the new length. If not, you could probably call Gunnar and they could do the math for you (and I'm sure they would) since they have all the geometry information. I had my frame made as a custom due to my short arms and they were quite helpful in getting that all figured out.

J.