I've done all the research and gone to mercedes but to no prevail. I have an 83 300d w123 and my vacuum pump is going bad. I suspect its partially because of the end play in the timing device, given my engine has 600k miles on it, so I plan to go ahead and replace the worn bushing before installing a rebuilt pump. All I need is a new forward timing device bushing but they do not seem to exist.
SOMEONE HELP!

The part that says bushing for clarification.