Yes, but they are pricey....about $45.
These boots are "Goodyear welt" sole construction, which means the sole is basically glued on and sanded around the perimeter to size. Because of this type of construction, you can apply almost any other motorcycle boot sole that used Goodyear welt construction. The Balance boots have a kinda premium natural rubber sole, hence the cost. If that is not necessary, you can sub something else.
There is a good place down your way for resoling: Jim Rice - Factory Motocross Boot Resole - 800-944-2755
Hope that helps.