Here are two sites that may be of help for you.
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X> How to apply for Disability in Canada...applies only to Canadians......Welcome to Fibromyalgia.(FMS). (The following information applies only to Canadians, we are sorry that we don't have any information for Americans at this time; but if anyone can supply it to us we will be glad to display it for all to use.) http://www.geocities.com/HotSprings/Spa/1222/disability.html
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Here's a Pain Management website that is meant for both the US and Canada. I don't know if you will find any disability information there.
.) The North American Chronic Pain Association of Canada (NACPAC) .....NACPAC's Mission Statement -- Who we are -- Links to Pain Resources serving both Americans and Canadians
http://www.chronicpaincanada.org/
Hope this helps,
Helen D.