The other option is ditch the engine and get another one 2nd hand.

first before all of this get to the garage for a verdict/opinion this should be free of charge unless work will be done on the car.

Bare in mind bearings don't just go....

by the sounds of things you either have put the wrong oil in the car or the car hasn't had a regular oil change thus resulting in the damage.

Bearings only ever go if there is a lack of lubrication or too much pressure, well a combination of both actually.