You can find them at Alidastore or R Somerville, and if you live in America, I think House of Tarot - all online.
They've more than three meanings each - you read sibillas in combinations. So it isn't so much one card alone, as that card, whether it's upright or reversed, and the cards next to it.
It takes a lot of practise, but it does make a great deal of sense once you get the hang of it, and the pictures help a lot. It's the combinations that make the cards so accurate, I think.
Say, for instance, you got the Message card. So you'd want to know what the message would be about - and the next cards came up the Thief and the House, for instance. The news would probably be about a family member's house being broken into. That's a fairly simplistic take, and wouldn't mean the same thing as it would in, say, a love reading (where it'd be more somebody's heart that got stolen), but the cards do work on a lot of levels - but you need to pay attention to what you're seeing.