VW California T5/T6 Sunprotection roller blind / Sonnenschutz-Rollo

simple small piece that easily breaks, but the official store doesn't sell small repair part. One needs to buy the whole roller blind to do the repair... ridicolous.
Got the measurements, sat down in TinkerCad and an easy solution is here.

This one is for the VW T5 California (integrated roller blinds)