My order thorugh Autozone for the Optima Yellow Top 51R was cancelled because of the product being out of stock. And went searching here and on google for more information and every website I can pull up for the 51R says it was discontinued and out of stock. Can anyone verify this for me? Looks like i'm going to have to get the 34 Yellow top and modifiy my wires. (They don't make a reverse post battery 34).