I did a quick fix during one regata. That fix lasts 2 years <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" /> untill I sold the boat (Nacra F17). I believe, new owner still use same trick.

While tramp is loose, slide old broken batten into slot under trampoline then tight the trampoline. Batten will jam a boltrope.