I am looking for CATALYTIC CONVECTOR

I have a 2011 308 1.6v engine. It was previously causing catalytic convector failure in my vehicle. It is of poor quality, etc. etc. they shook, I didn't wear it either. Until recently I washed under the car. I don't tell you too long. Parts of the catalytic convector inside the dispersed end silencer. They said I need to change the price of 3000 TL in Amasya. For the original part.

There are friends who sell spare parts or do business. I would be glad if you could help. If necessary, I can bring it outside the city for maintenance and change.