Hi Tristan,
Sorry to hear. I got mine rebuilt 4+ years ago. I am in Canberra. I called around and found someone who knew what to do. The M32 is used on a few other cars and the design is similar to other boxes so someone should know how to do it. Just call around until you find someone.
I got the bearings kit, from the UK, and then got the shop to open it all up. Once they opened it, they found a few other components that needed changing as well. I then ordered those, from the UK, in a second order. The car was in the workshop for about 2-2.5 weeks in total. I got the gearbox mount insert, short shifter, LSD and Courtenay breather kit installed at the same time. The clutch was changed as well. As they had to take everything apart anyways they didn't charge me any extra for all this.
I bought all the gearbox parts from https://www.onestopgearboxshop.com. I called them and got them to remove the VAT. They were good to deal with and the shipping was fast.
The kits available now include uprated bearings and updated end case which are a change from what was used on the earlier cars.
Get a good fully synthetic oil put in and change it regularly as the heat is one thing that kills these boxes. With the updated end case you should be able to use 3L of oil in the gearbox.
I hope this makes some sense.
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