Buy a dehydrator and make some of it yourself.
I just made beef heart jerky last night and it is really, really good.
I also made my own pemmican this weekend and it was easier than I expected. Pemmican isn't light, though, but it does satisfy well for its weight. I made my own jerky for the pemmican and used US Wellness Meats beef tallow. I followed these instructions:
Food, Hydration, and Nutrition » The Process of Producing Pemmican -- BackpackingLight.com Forums
In the past, I've dehydrated fruit. The only worthwhile fruits were bananas and fuyu persimmons. Any other dried fruit is way more economical to purchase.
Just Fruits makes excellent freeze-dried vegetables and fruits. Freeze-dried is much lighter than dehydrated and basically the exact same stuff, minus the hydrolized xyz that pre-assembled backpacking (or other supermarket shelf) meals use.
Wilderness Dining -- Camping Food, Backpacking Food -- Experts in Adventure Cuisine! Freeze Dried and Dehydrated Food, and Cookware for Backpacking and Camping
For pre-made stuff, try Mary Jane's and see if there's anything you could eat. It's supposed to be all organic and I think there are no artificial things in it. People rave about it (and some say not spicy enough) but I have never tried it. MaryJane's Outpost
Some favorite ingredients of my own (some of these you can get in Asian markets):
Curry spice paste
Dried whole anchovies
Foraged mushrooms and greens
Fresh hard cheeses
Tuna, salmon, chicken breast and even spam in the foil pouches (yeah, I know, spam is bad)
Butter (put it in a peanut butter jar so it doesn't leak)
Also, check Dicentra's awesome site for ideas:
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Female, 5'3", 48, Starting weight: 163lbs. Current weight: 135.
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