These folks can make any gasket you need from copper and at many different thicknesses:
http://www.headgasket.com/
I solved my 3.0 headgasket problem FOR GOOD with a solid copper gasket from these folks.
I spent a weekend at work modeling this concept on an engineering thermal analysis tool before concluding that the copper gasket was the solution to the problem. Good idea to use head studs vs bolts, delete the rear cross over exhaust, replace the clutch fan with a flex fan and install a new radiator as well.
I derive no benefits from promoting their products.
My $0.02