I've tried their website and apparently it doesn't exist. None of the retailers have a link or the 1000 calorie size. Just where does Doug get his? On a side note the manufacturer link for sos foods on this website doesn't work either.

I don't think they make a 1000 calorie bar, I think they are typically packed as individual 400 calorie bars. They make a stack of bars and wrap them together as 2400 or 3600 calories bricks. It seems like that's the standard with many of the survival rations I've seen. Here's a pointer to a site that has them:

http://www.emprep.com/food%20water.html

Also on that site are "New Millenium Bars", which come in some MRE's. They taste ok, are a little dry, but, also packed with calories. For some reason, even though they are reasonably healthy, and vitamin filled, our boy scouts will eat them on hikes. I guess if you're hungry enough...

Leaving aside S.O.S. Food Labs, there are others you may wish to try for a 1200 calorie alternative.

Mainstay 1200 cal "Energy Bars"

Mayday 1200 cal "Food Bars"

Survival Instinct 1200 cal "Food Ration"

Stay safe,
J.T.

The 1000 KCAL packages are made for the aviation life raft manufacturers. Not sure if they are available otherwise.