I'm certain that Joe can hook you up, however I just noticed that you are in Gloucester Co. Joe just moved his shop to Surry Co, near the Courthouse complex. He does a terrific job on custom exhaust systems. Top notch and very reasonable. Give him a call, see if it'll be worth the trek across two rivers to come get it.
I just thought about this also....try giving Michael Modr (pronounced Motor) a call. He runs/co-owns Modr's Service Center in West Point. He also does custom exhaust. An interesting story.....He ran 3" stainless on a 66 Chevy C-10 that I had years ago. Did a super job. I watched him study the underside of my truck for about 5 minutes an hour later I was driving off after paying his Mom - LOL! He might have or be able to find you some SS tubes like you're looking for. West Point would be a bit closer also. His number is (804) 843-2433. Good luck in your search.