Exhaust – what am I buying?

Hello everybody, after 19 years the end tube is rusted to me the last time! I am outraged! But because the flex tube is also dying and the cat already rattles I want to make everything new from front to back. The free workshop of my trust calls for the cat 500 Euro and for the end pot with pipes etc 300 Euro. Probably all original Volvo. Which other trade names can I use calmly? Greeting Sven