Jimc101 makes a good point, albeit an antiquated one. We really shouldn't worry about the nominal travel offered by a fork, but rather it's ATC measurement, and then subtract a l'il bit for sag. there are other considerations, too, such as rake and offset, but I personally feel that the impacts these things have on handling tend to over-rated. Yes, you'll feel a difference if you change any fork parameters, but you'll also tend to find a way to compensate, if the new fork is anywhere in the neighborhood of the old fork's spec.
That being said, I couldn't find much info on your fork, but I saw some for the 60mm version. ATC is listed as 470, which is right near the ATC of most 80mm 29r forks. If you want a fork with similar ATC and all of the touring bells-n-whistles, check out the Surly Ogre fork:
(from surlybikes.com)
The Ogre fork replaces 80mm suspension forks designed for use on 29˝ wheeled bikes. Made of 4130 CroMoly, it’s got 51mm IS disc mounts, removable canti pivots, brake-line guides, low-blade threaded barrel bosses and mid-blade eyelets for a rack. This fork is designed to run disc brakes, fenders and a rack simultaneously. Two sets of water bottle cage mounts, one on each leg. Each cage may be run in a higher or lower position. Steertube is 1-1/8˝ threadless steerer. Black powdercoat finish.
Axle-to-crown: 468mm
Offset: 43mm
Steerer: 260mm
Tire Clearance: 29 x 2.5˝
Weight: 3.1 lb (1.4kg) uncut
