I have a used original axle, 4.08 ratio, from a 1971 280SL with 157,000 miles. It was running great when the axle was removed to put the car on a rotisserie in 2014 for restoration.
How about $10 and come and get it. My home has sold I got to move on.
howard.long@ymail.com or 770-401-6677
Howard