I bought some short levers from Screaming Demon (eBay store). They initially sent the wrong brake lever, but when I called on a Friday arvo they were extraordinarily helpful, and I had the new levers on Monday. They even included a free alarm kit as an apology for their stuff up. Very highly recommended. I'll do a write up on the installation of the alarm, and I'll follow it up with a write up on how it is to live with in a few weeks.