Vince, Unfortunately I don't have any insight about Season passes from 2013 but I will forward your info along to someone who might that can, hopefully, help you out. Was this via a Kickstarter campaign?
Nah, I couldn't use paypal during the kickstarter campaign. This was back in the day when I didn't have a credit card. So I waited until the season came out and then bought it through the explosm site using paypal. (I have the transaction ID if that helps). If this is going to be a lot of effort then never mind.