We're staying on site but I'm sure it works the same way.
I grabbed an old left over gift card, went on disneygiftcard.com, registered the plastic card and then transfered the e gift card serial number to the plastic gift card. I had multiple e-gift cards that I added to one physical gift card.
I imagine you could grab an empty card like at Target and transfer your balance to that if you don't have an old one laying around