Talk to Mike Raby at TTi, they will custom bend stainless certain times of the year. When ordering, add "SS" at the end of their item number. At first I bought the Pypes, "X" pipe back, but it didn't fit right. Oh you can also buy stainless steel headers from TTi.
Do you have a picture of your system? Do you remember the cost? I used 1 pypes system and have another one waiting to go in, and it fit with no issues for us on a 69 charger, we hung the x back (it fit perfect), and then had the muffler shop make the down pipes.. So for the price a full stainless system under $600 was a no brainer... I know another guy who used the pipes system but bought the tti down pipes (coated) and he got it to work..