Vee_Que;99666 wroteJames, the best thing to do for your m46 is replace it with a t5 or supra box...
People have made up new rings too. Not cheap though
And there's no need to replace them if they aren't worn and only the clutch material between is worn. . .
What are you high? And lose the electric overdrive? It's the coolest button in the car!
Plus it absolutely does not need any kind of work, shifts like its new. I just like knowing where to find parts.