GT baby

Hi, I just registered today. Had starlets 5 years, started with a normal one, then a GT 95 Advance and now also a Glanza 96. The Glanza has a Tanabe exhaust. However has rusted and coroded, not the box bit but the pipe coming from it. Do you know IF I can cut out the coroded bit and if so where I can find this section of exhaust from? I'm new to is all so haven't a clue where to go!! Thanks GT baby