just keep replaceing them, ive only ever broken one but the sedans has always had a noisy 2nd gear, just waiting for it to go... ive got 2 spares lying around and both are good!
The 120 y ones seem to be the best, the sunny ones have an additional 4th gear sensor thing that can foul on the underside sometimes... did in the coupe.

As for the clutch, exceddy is great for a warm a15.... for the $$$ spent