lost a piece of piston...Stumped?

id check the wholes to see if they are in round ,like it was plate bored I think they under bored the holes went .020 over when it needed .030 over or went .030 over and put oversized rings on .020 over pistons, wow I did that to my very first car 37 years ago ,was a 69 Camaro that I always over reved it ,until 1 night it got real slow I took off the head s and had 3 pistons that looked like that mike from performance research just finished my motor if you want a new bad *** 360 +.030 with RHS X HEADS 2.02all done up 62cc heads / cc 525 20-228-4cam m1 intake I could sell you and have another 1 built quik and would come with a warrentee . I know that feeling that sux and I would rebuild a new motor if it was mine , I hate to see what other damage is done ,trying to just thro a new sleve and cylinder in it .that's beyond bandaids but I don't know much about building motors with more than 2 cylinders in them . ive seen them a lot worse at 13000 rpm any 1 down south would love that rush right now down the roads lol what a bummer I do have old cheap pistons if you want to put that engine back together pm me if interested or want performance researches phone # 3/4 of what he builds is mopar , midget and sprint and modified engines.G/L WITH THAT 1 bummer