The only offerings through Buck for blade upgrades is the 110. There are other folding models with premium steels, that are offered through Limited Edition releases or through Special Projects by certain dealers. Sometimes if a blade is broken and returned for warranty work, it may be rebladed with an upgraded premium steel replacement because that was the only steel type available, but if you broke a BG42 532, I doubt it would be returned with a 420HC blade. Buck Knives takes care of their customers.