If you are having to go a full day without eating, then it sounds like you need to rethink your weight class.
Just curious, are you in high school or college? My son did wrestling, but he was going through a major growth spurt, so it was a nightmare with declaring a weight class - he grew almost 2 inches in a year!
But, or you are stuck in your weight class for this year, Snickers makes some great protein bars. They have a good balance of quick carbs for instant energy and protein to help you last. But like most protein bars, they taste pretty bleh. My son uses them for kayaking races and triathlons- because he needs all the energy he can get, but not get too full.