For anyone interested, I just noticed that LN has 3 different sized O1 chisels available and in stock for the moment under Tom's toolbox. Haven't seen them have the O1 material in quite a while. Anyone needing them for a set take notice. Last I looked, the 3/8, 5/8 and 3/4 were showing as in stock. Probably only have a limited number of them though. Good luck.