Does anyone know where I can find replacement box blade rippers with the notch in the back? I found some with center holes, but can't find any that are back notched. I've got 3 on mine that are bent pretty bad - from ripping stumps out 
Also, how do I tell what quality they are? I'm not too familiar with types of steel, but I'd rather something more flexible than brittle. Someone here on tbn a few weeks ago was having problems with the rippers breaking. I don't want that - I'd much rather they bend. The ones I've got will take brutal treatment without damage and I want replacements like them.
Thanks!
Also, how do I tell what quality they are? I'm not too familiar with types of steel, but I'd rather something more flexible than brittle. Someone here on tbn a few weeks ago was having problems with the rippers breaking. I don't want that - I'd much rather they bend. The ones I've got will take brutal treatment without damage and I want replacements like them.
Thanks!