A makeshift Skip-Bo deck can be created from three standard (54 card) decks of cards. While the decks having the same back is nice, it is not strictly necessary (Skip-Bo is not that intense of a game that the additional information that having different backs gives will affect the game is any meaningful way). A 54 card deck is a standard 52 card deck (4 suits, ace through king) plus the two jokers. Shuffle the three decks together.
Suit is irrelevant; only rank matters. The mapping is: aces are 1" s,="" 2's="" thru="" 10's="" are="" 10's,="" jacks="" 11's,="" queens="" 12's,="" and="" kings="" jokers="" both="" skip-bo's.="" this="" gives="" the="" same="" distribution="" of="" cards="" as="" original="" game="" (12="" each="" 12="" numbers,="" 18="" skip-bo="" cards).
Play is exactly as by the standard rules. The advantage of this variant is that if you are particularily tight on space, want to take Skip-Bo along, and are already taking a couple of standard decks of cards anyway, this allows you to play Skip-Bo without having to take its single purpose cards.