Where can I buy purple sticky rice?

That sounds like black sticky rice. It's black at first, but when you cook it, it turns purple-ish. You can actually buy it at any Asian food store. They should have it in their rice/grains section.

But if you want to buy it online, it's here (it's the last one on the bottom of the page):

http://www.templeofthai.com/food/rice/

Well i didnt google anything^^ this is just personal obs. you wash the rice then cook it in a basket that steams the rice an makes it sticky. the purple rice you speak of is very very sweet and taste like candy its purplish/black and is a desert. you may be able to find a pack at an asian store. thai chicken is usually baked with simple seasons of garlic, msg, and thai glaze you can find at an asian store. chili sauce you can buy at an asian store. if you want to make chop up thai chilis cook them in a pot with a little water add sugar until however sweet you like it.

Thai black rice is what you are after try

www.importfood.com