Take the remains down to your friendly local auto parts store and
see if they have one. They are fairly standard items, subject to
relatively frequent failure. If the threads are not exactly the
same, don't try to screw it in. Put a little grease on the threads
when you put the new one in so it doesn't get that way too.

(I believe these are unified threads - inch sizes.)
--
George Downs Bartlesville, Oklahoma