Lots of turbo bearing kits on eBay and other internet sites. Most are likely from China but there are a few sellers that claim US made.

People also forget that if the Turbo has ever been rebuilt or especially if it was exchanged for another the it could have Bearings with an ID smaller and or an OD larger.

That has only happened to one Person I read off. Bought the Standard sized Bearings and found they would not fit.

If someone else is reading this the Turbos on the later Model (6 cyliinder)Mercedes that have Garrette/Air Research Turbos there is 3 different types of seals used on the Compressor side.

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84 300D, 82 Volvo 244Gl Diesel