There's a company called paper mart which sells wholesale. It's the paper that nice dept stores like Saks and Neiman's use. I just went to the site and entered fictitious info and it never asked for company sales tax number so anyone should be able to order. It asks for a store name so if you're interested just put Disney Scraps or your name or whatever.
There are large reams but a lot of the papers also come in 100' cutter rolls-the paper is in a box like aluminum foil with the cutter part of the box. It's great and so easy. They also sell ribbon, boxes,etc wholesale. There are other companies that say they're wholesale but they can't touch these prices.
I'm not affiliated with this company in any way but when I saw someone else who loves wrapping as much as I do, I wanted to share. Here's the link:
http://www.papermart.com/