I eat weight control oatmeal, it has 6 grams of fiber. But I think that fiber one cereals might have more. It may be a soluble/insoluble thing, I'd prolly bet on it.
What kind do you eat? I eat the banana nut bread and the maple brown sugar. It has 160 calories, 6 grams of fiber and I think 8 grams of protein. I even started making oatmeal pancakes and drizzling them with sugar free syrup. Those are good.
I know people say ONLY EAT THE STEEL CUT OATS! But honestly I have a package of those and they have the same fiber as the weight control ones and the weight control taste A LOT better with flavors etc, and i'm willing to spend the extra few calories so that I can eat something relatively healthy that I wouldn't eat at all if it weren't for this as an alternative.
Other foods high in fiber are various fruits/veggies, I eat apples, bananas and prunes every day, I also eat black beans often, and whole wheat/grain english muffins and sandwhich thins (8 grams and 6 grams for the latter). I also eat fiber one muffins for breakfast about every other day. (5 grams) Today I got 41 grams of fiber.
If you need any ideas I can link you to my daily plate and you can check out various sources of fiber and where I get them.