I find carob covered raisins in my local HFS. I've never seen them anywhere other than at a HFS, actually. It's an acquired taste, but once you get used to them they're really quite addicting. I ate a decent amount just because I felt like snacking... but I don't know how many it would take to do the job! I think they're just a yummy way to get some extra IF.
As for the cider, I would assume the instant kind would work. I've never tried it. But I bet it still has a lot of IF!
-------------------- "Anyone can exercise, but this kind of lethargy takes real discipline." -Garfield