Halfords sell them . You need to compare the diagram on the relay to the photos on their website.
Halfords relays

MSCC members can print a 10% discount voucher. I note you are in France so I guess other websites could help.
If you 2011 car is like my 2014 one then the ac relay is not used and can act as a spare. Not the case if you have aircon.

JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"