Remflex Gaskets are awesome, and I know you can get material to cut your own... I had an issue with sealing the exhaust on my Trans Am-- the Hooker headers were warped a bit... I went through several pairs of Fel-Pro (supposedly the best) before finding these. I've recommended them to several friends on my Pontiac boards and they've all had great success. They are very thick, but have excellent "squash-ability". And they withstand tons of heat. Looks like they produce the VQ gaskets, but there are uncut sheets for 35 bucks for anyone else having issues with sealing or blowouts!! Made in USA, and they stand behind their stuff 100%.

http://catalog.remflex.com/