I knew it would be you Cassie when I saw the usename ! Welcome to PF
You can buy flexi joins as we use them on conversions.
http://www.predatormotorsports.co.uk...weld-in-type/5
Anything like that will work for you, just measure the pipework on your exhaust and order the correct one to suit your car.
Jonboy (Barb's) mate
Edit,
Reading back its not exactly what your after but it will work, someone on here may know of the exact bit you need but I'll be honest I personally know nothing about the FRS so thats the best I can come up with