Re: need chaat recipe!
Coco, there are a few ways of making papri chaat. I know a few of my indian friends keep everything separate and get people to make their own, depending on how much they want of each item.
Another way is to add your spices to the chick peas (salt, pepper, chaat masala), cillantro, tomatoes, etc. Make your imli chutney with sugar, salt, and red chilli. A yogurt chutney with spices (or you could mix that in with the chick peas.) Keep your papri stuff separate and add to your chaat and then pour some imli chutney over it.
I'm sure you can get papri from desi store, but most people I know make their own. The easiest way is to cut up tortilla and fry it until it's crispy.