Relay gearbox problem: 5th gear, 3rd synchro, all baulk ring circlips

[Oliver53]

2003 Relay, MLUC gearbox. Stuck in 1st gear, took it apart, found several issues. 4 out of 5 baulk ring circlips snapped, and one was caught in the 2nd synchro hence gear stuck in 1st. They all need to be replaced. The 3rd synchro ring has had some nubbins, should I replace it? The 5th gear has lost three dog teeth, if I put it back it should still work but I reckon I'd better replace it. Thoughts please?