where can i find wholesale suppliers for Quinceanera supplies?

I’m not looking for answers about where I can find cheap available to the public items, I’m looking for *business license/tax ID required* wholesalers.

The best place for you is to buy from suppliers or manufacturers directly. You can find the list of suppliers or manufacturers with complete contact details from B2B websites. You can even contact these suppliers and send business inquiries to any supplier or manufacturer directly from these B2B websites for free. I can suggest you to search from http://www.hellotrade.com or http://www.alibaba.com B2B websites for you.