Call up Kershaw. Contact | Kershaw Knives
You'd be surprised what they will do customer service wise. They won't ship you a new blade but they may depot rebuild it for you for free even if you offer to pay for it.. If you don't get anywhere there (highly unlikely) PM me and I will get you in contact with one of their company reps on another message board.
Whenever you loan out a knife ask whit they are going to do with it. If they are asking to borrow one its because they don't have one and most likely don't know how to use it. A knife is not; a screwdriver, a chisel or a prybar. Yes I feel your pain