When one of mine gave up the ghost, I contacted AV and they ordered new parts for me. However, the replacement parts were different - genuine MB parts - the plastic insert types no longer being available. Not to say you may not be able to get some NOS parts anywhere.
The new parts require some modification to the existing bits - the ball ends having to be removed and coupling nuts/bushes to be made or purchased separately.
Some more info here: SBU reverse lever linkage
The new parts require some modification to the existing bits - the ball ends having to be removed and coupling nuts/bushes to be made or purchased separately.
Some more info here: SBU reverse lever linkage