When the sternum strap buckle broke on my Gregory Baltoro 75, I thought that was the end of the backpack because Gregory sent me a replacement strap (different buckle type) that was going to be impossible to install. Then I found a company called Ripstop by the Roll: they sell a Stealth Sternum Buckle 5/8" that is a perfect match for the Gregory buckle. And only $0.90 each.