Just browsing through the Yojoe.com archive, I found that Zanzibar and his Air Skiff were available through a mail-in offer. His figure page doesn't mention anything under Variants, but wouldn't his mail-in filecard have had a red backing? (Perhaps obvious, but the red filecard variation is noted on several other figures' pages.)

zanzibar came just like the store in a bubble and the back is cardboard. His file card is packed seperate from him and the front is white and the back of that is cardboard as well.