My E58 gearbox needs a rebuild.

Use megazip.net to find your part numbers.
I found kits are expensive in comparison.
Best to contact Terry O’beirne (Facebook Mr2 parts for sale), who likely have your parts and advice on what’s needed. Sometimes extra things are “best” done whilst doing the gearbox though may not be needed now or on your gearbox builders list as they deal with other gearboxes.

Sorry, to clarify terry may have a response to other posts on that page (not a moderator).
Look up his name and his standing in front of a car, located in Brisbane area. Hope that helps.