Larger intake gasket

I just installed the billet manic mechanic intake. I realized the gasket is much smaller than the intake now. What i need is a larger gasket so my motor can breath better. I tried cutting some excess off the original gasket but the gasket is so thin I feel i may break it. Anyone know where I can find a intake gasket with a larger opening?

I got some of that gasket material and made a custom gasket. The only problem is its about half the thickness. I am guessing that won't make too much of a difference since the material is made exactly for carbs. Just an afterthought.