How to fix a Broken parking brake on 1995 bmw e36?

I have an 1995 bmw 318i with a non working parking brake. When you lift the the parking brake up it does not hold because all the TEETH or notches, are worn out or stripped. Can i replace that part or buy a new parking brake assembly? ThanksHow to fix a Broken parking brake on 1995 bmw e36?take it to a mechanic. might cost more, but its easier.