walmart
Supermarche Champion?... I think this is the main supermarket in France... ~ http://www.designerclothesonline.co.uk/ ~
http://www.blueskysearch.com/retail_companies.htm
perhaps try oriental trading, or firemountaingems.com
Buying wrapped candy in bulk is probably best done by ordering from a candy warehouse. You can buy in bulk and it will cost you less than going to a supermarket and trying to buy bulk. Many warehouses are available to order from online.
shops and internet. some online shops are eBay and amazon. eBay sell single disks or some people sell bulk disks
The larger supermarket chains in France are Carrefour, Auchan, Leclerc. Carrefour leads the way for large supermarkets, Leclerc leads in medium-sized supermarkets. Smaller supermarkets chains include Carrefour market, Intermarché, Casino, and the hard discounters Lidl, Aldi, Leader Price.
It's not common in all regions, but yes, if they bake or carry it, they sell it.
They buy it at their local markets. People from larger cities also make use of supermarket chains such as Walmart, Soriana or Chedraui.
Just about all of your major travel center chains will have it (TA/Petro, Pilot/Flying J, Love's).
Yes, they are accepted according to policy at most supermarkets. Some supermarket may be weary of counterfeit coupons, so if you plan on using coupons make sure where you got them from is visible somewhere on the coupon.
You can purchase water bottles from any major supermarket in your local area. If you are after bulk purchases, you can purchase these from any reputable water company such as Neverfail.