Contact Dunniway:
https://www.duniway.com/about-us(no affiliations etc....)
That is usually where I end up for vacuum related stuff. Last time they did not have the bearing for my turbo but they steered me at the right place.
They did have the replacement filaments for my ionisation gauge though.
Some turbo are quite particular about the right oil. Also, looking at the size make sure it is well fastened with the correct mounts to your bench after initial rotation testing.
In one lab I remember a turbo on the floor across the room that ripped up all its vacuum (mobile station with a flexible on top, not bolted to a vacuum chamber) and electrical connections when a rotor blade failed in the middle of the night. They have a lot of energy stored at full speed.