ok on my front hayes disc brake, ya know how the lever has a safety release....where the lever pops out and there's a little ball that pops out?... (i'm new to the sport so bare with me) well my lever was out of the socket, when I tried to pop it back in it wouldn't go. So I looked inside the rubber gasket and found bits a pieces of what used to be the seal or the ring that locked the ball into place....SO........do I have to replace the whole brake system now? Or can I just replace that one plastic part that says Hayes on it....or what? And where can I get a decent price for something like this? Help a noob out porfavor!!