I never thought of ULine ... we have it here in Canada and here's the link ....
http://www.uline.ca/BL_1959/Freezer-Paper?keywords=Freezer+Paper
However, most of us probably will not want to get 1100 feet of it!!
For those interested, the Ontario depot is in Mississauga just off 401+407+Mississauga Road and you can pick up at the warehouse. I've dealt with them and very interested in even the smallest of orders. Bonus ... if something is not what you want, you can return it within 30 days, no questions, and no return fees.