You're not going to the right place, stay away from midas and Monroe type joints, they want to sell you a life time muffler, but also sell you the thinness cheapest pipes, ensuring you muffler will be paid for 4 times over with tail pipe replacements, including hangers and labor.
Poke around at some of the family owned local shops, also check with the local motor heads, and drag racers, they know the place to go. Look for mandrel bent and mandrel bending hydraulic equipment.
They typically will not have stainless in stock and have to order it, and it may be something they have never even tried, so ask if there is welding involved, what type of welding would they perform... You want to hear TIG or GTAW.
I have an aluminized exhaust on my 02 Taco, and honestly, one of the worse things you can do in the winter where there is high concentrations of roadsalt is park your vehicle in a garage, the warm temperatures allows a much quicker corrosion rate than if you left it in the drive at 13 degrees all night, this combined with and moisture either introduced from the road or combined with condensation also increases the corrosion rate.
There are also various gauges, be sure to verify the gauge of the pipe prior to install..
Good luck.