There are mini cupcake/muffin tins sold at a variety of stores, in fact I just saw them at Bed Bath and Beyond yesterday while I was in there for something else. I myself have not dove ino the mini market and sell ony regular size cupcakes. Michaels has cupcke liners for mini's or Im sure you could buy online at amazon or some other online store. I buy my cupcake wrappers from a local kitchen supply store just because they are cheaper.
Hi! I love making minis!! You can either buy the mini cupcake pan, OR, you can get a babycakes cupcake maker (my personal fave). http://thebabycakesshop.com/catalog/product/view/id/7/s/cc-2828bb/category/13/. However, it only makes 8 cupcakes at a time, so if you're doing 200 cupcakes, it's probably easier to bake them in one of the 24 ct mini cupcake pans.
You can get mini cupcake liners most anywhere now. Walmart usually has cute seasonal mini cupcake wrappers, as well as some standard colors. Michael's also has a selection of mini wrappers in generic party designs and solid colors or metalics. They also sell cupcake boxes.
If you're looking for a cool pattern, like zebra, damask, polka dots/stripes in certain colors, etc...try etsy.com. There are A LOT of options in the paper goods arena at that website.
Good luck! Post pictures when you're done! 
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