bstring

I bought a Warwick Corvette 5-string that I love to death! I was playing a show and the saddle part that is very small popped out on stage! The Guitar Center in Portland Maine where I bought it new has told me they can't get the part. I am stuck using a bass that does not come close to the tone...

Ok...so I have a new JAN III on my bass. The B string rattles at the nut when played, no other string is doing this. When I press downward on the string over the nut, the rattle goes away. When I switch back to the JAN II, no rattle either... It seems as if the cutout for the B string is...