I know that it's an easier [custom] job for cars like the G2 teggys and the 4Gen civics because the mufflers on those cars go across the back the width of the car.

But for your teg and 5th gen civics and up, it's best to do with a canister type muffler. Might want to look at the 5Zigen (which you probably already know) A'pex-i, Blitz, Buddy Club, and HKS. They offer canister type exhausts for your car and I think that there might be one available that comes out at an angle.