Replacing it means another $400+ so I would inspect the side. If there are no marks then it should be ok. If your sleave survived then I woudl guess the side of the piston survived as well. But, inpect it and see. And even if it does have a mark go ahead and see if you can clean it up. The worst that is going to happen you have to replace the sleeve and piston. Well, duh, you would do that anyways.
Thats pretty cool. If the skirts dont have steel embedded in them and there are no cracks I would run it out of spite. Ive never seen that in any siezed cranks before . Must have been a fast failure.