Search for the name of a part of the roller blinds

Good day,

a part of the blinds (mounted outside) is broken and I would like to replace it.
I do not know what this thing is called, it serves to keep the blinds in the same vertical plane from both sides (otherwise, when rolling down, the blinds get pinched).
I hope you can help me and tell me what this thing is called.
I would also like to know where I can buy it (online or in store) – at Obi in Nuremberg, there is nothing like this.

Thank you very much!
nem0

Hello,

these are roller shutter intake funnels.
Available on eBay or at almost any window manufacturer.

Regards

Perfect. Thank you!!