440 Pistons, How F*cked am I

Look on the under side of the piston to see if there is a number, If so, post that number in a "Wanted" ad on the site. There is no telling if someone may have a spare floating around. Personally, I'm with RRR. I wouldn't take a chance because cast pistons can have tiny fractures and with come apart with no warning. Measure expense versus looking time for a replacement.