You may have to have it made. Standard SS pipes (OEM) are ok grade of stainless but will have some signs of rust as most SS <302 grade will.
My standard OEM SS exhaust is still fine after 11 years and 146,000 miles.
Already been to our local shop their bender will only handle up to 3". After talking to quite a few people thinking of picking up a chrome stack installing my own baffles then paint it flat black.