Getrag Re-build Information, Parts, etc.

Our gearboxes are 20 years old, and if yours are like mine, they have had hard use, are getting noisy and rattle a bit in neutral at idle: bearings wear, engagement forks wear and adjustments need re-shimming.
My spare gearbox goes in next week and I would love to get into the old box, tighten it up, look at possibly lightening the gears, up-grade the bearings where appropriate and bring it back to spec.
Perhaps one of our European members has access to Getrag info and can help us all out. Posting a PDF copy of a rebuild manual or even just the setting/wear tolerances would be a great help.
Are parts (new forks, bushes, etc) available?
They are fine gearboxes and contribute much to the character of the car.
Does anyone have any info on re-building these boxes or a source of parts?
Thanks & best regards,
bobf.
My spare gearbox goes in next week and I would love to get into the old box, tighten it up, look at possibly lightening the gears, up-grade the bearings where appropriate and bring it back to spec.
Perhaps one of our European members has access to Getrag info and can help us all out. Posting a PDF copy of a rebuild manual or even just the setting/wear tolerances would be a great help.
Are parts (new forks, bushes, etc) available?
They are fine gearboxes and contribute much to the character of the car.
Does anyone have any info on re-building these boxes or a source of parts?
Thanks & best regards,
bobf.