lane downs: I'm not a fan of modifying exhaust systems. Straight pipes in place of bad resonators(if that's your problem), would not make it any quieter, unless of course they were filled with holes you could easily see from underneath the car. Best bet for sources of supply would be a salvage/junk yard, or dealer. I don't recall your location, but a good parts store may have mufflers, NAPA(US) etc. In the old days the exhaust was set up to provide a certain amount of back pressure among other things on the engine. It may not matter with less back pressure on todays engines, I don't know, but, why mess with mother nature....? If it were me, I'd start with the mufflers?

Ralph