Seat foam for kx250

I need new seat foam for my 07 kx250. The one I have is currently shaved down for my short legs and falling apart. I'm not even sure it is cut to provide optimum body position when riding. I wasn't thinking about body position and sitting up on the gas tank for turning when I cut it. It looks like a free style seat now. *How do u cut ur seat so it correct? I look at the pros seats and they look so flat, thin and straight from the gas tank to the rear fender with a lil dip after the tank. Second I can't find any company's that make seat or a gel for my bike. I want a comfortable seat but one that looks like the pros seat and low for my short 31" seam legs.