there was a guy who was supposedly tooling up to make that part, i will try and track him down for you. i had heard macari's didn't have them a few years ago, but don't quote me, you should still check if you can.
there is no real magic to setting them up, hit me up at email@example.com if you run into any issues. prefer to help you fix rather than have you send in for this.
when you say, ' stopped working' , what is the exact symptom?