Troubles locating a downpipe to cat gasket

[Onefast99gsx]

hey guys-

Where do you get your exhaust gaskets from? I'm having trouble find a new downpipe to cat converter gasket. It's a 3" with a 2 bolt flange. I've tried both Napa and Carquest without any luck. The only other stores around me are Adance Auto & Checker but they about 50 min drive. Any help would be appreciated, part numbers would be even more appreciated. I just can't reuse this one that was on there any more.

Thanks.