Hi guys..I am restoring my grandpa's fiat 600 1953..Till now as you you wont find any spares here in Pakistan..Using stock piston,,i was thinking of getting new pistons but couldn't find and place here in pindi/islamabad..Went to a piston specialist,,he told me the Pistons will run just fine--rings need to be changed,,i have ordered rings but they will be standard japan's NPR..SLeeve has been finished..Will post pics as soon as i visit my mech