I think I'd try to wean then severely limit the carbs he has access to only because (as we know low carbing) carbs begets the craving for more carbs...
Once the habits are ingrained, then adding carbs back in slowly might be the way for him to make the right choices long-term.
Right now, it's that and it's a learned behavior that he grabs the carby yummies to 'fix' the hunger. We know carbs don't last long, so of course he's constantly feeling like he's starving! If he doesn't have them, he'll have to 'fix' it another way.
In the end, Glendora, you can only do the best you can and I'm sure whatever choices you make can only help the situation. Hey? At least you're acknowledging it and trying to do something about it! That's a WIN!