Old wallpaper approximately from the 1970s

Good day,

I have to repair a piece of wallpaper, but I do not know if the wallpaper is still available for purchase.
perhaps someone can help me based on the picture.

otherwise, the whole room would have to be re-wallpapered.

Best regards Hendrik Planz

Have you ever looked in the hardware store or visited a specialty shop?

Yes, but unfortunately I did not find the wallpaper

I would contact the most common wallpaper manufacturers by email and inquire. I have had good experiences with that.