High carb does not by itself imply high calorie (especially since a gram of carb and a gram of protein both have 4 calories, so high protein doesn't make it any lower calorie).

You sure that isn't just getting a BoB meal and eating the cardboard box instead of the contents? (And to answer the question, no, but I haven't ever tried ordering a special meal on those flights where I actually get one. I might try it since it seems they're better, though...)