Assuming there is no warranty to apply to the situation, first I would check with Kevin and/or Steve for suggestions or some other professional rod building / service center. If no one was available my first choice would be a piece of titanium wire of the correct size about 4" long and some epoxy. Spring steel wire would be my second choice. My brother in law has been fishing with a St. Croix ultralight spinning rod with a 4d finishing nail in it since the mid 70's.
"Patriotism supporting your country all of the time and and your government when it deserves it"- Mark Twain