If you are flexible about manufacturer, you might want to look for belts made by Spalding and Hurlburt.  Both made a model or two for the Krag.  They usually had sewn-on loops instead of the Mills, woven type, but they are usually a bit cheaper than Mills and, although they usually seem to be for 45-70, you might find one for the 30 cal.  I have a Spalding with the sewn on loops that I used for 30-40 and they seem to fit pretty well.  I think both brands have horizontal, blue or brown threads in the belt (but not the sewn on loops).  John Spangler at old guns.net currently has a couple of Hurlburts listed.  John is listed as a founding member here and is a great person to do business with.  If you ask nice, he might even answer whatever questions you have.