Hi folks, hope you're all well?

Just a hello first, got a '91 Audi 100 2.0 E.

Trouble is, it's done a few miles. In the last few days it's developed a nasty habit of spewing sooty black dust all over the rear bumper. I know the previous owner ran it for a while with very little oil so I think it may have a scored liner or bust piston ring. I'm thinking of rebuilding the new engine and need to find a supplier of ALL the parts needed to do this.

Need to find a supply of stuff like crank bearings, rings, valve seals - everything!!!

Anyone know of such a place?

Ta in advance!