If the ID of the bearing is larger, the end of the crankshaft will not be supported unless you sleeve it. That's a heck of a lot of work when the basic design isn't a problem. OEM covers don't cost an arm and a leg, so if this is intended as a way to save the cracked cover, I would just replace it.
Two problems come to mind that would crack a cover. One is the starter gear drive blowing up. The second is a bent crankshaft. Make sure you check the run-out towards the end of the shaft, or you might be replacing the cover again.