Q.Locating Specific Seeds
Where can I purchase pink black eyed Susan seeds from ?

Certified GKH Gardening Expert
We don't make vendor or product recommendations, but I did an online search and I saw black-eyed-Susan vine available in pink from several seed catalogs. I did see a Cherry Brandy Rudbeckia hirta available in seeds, but it was an American company that did not ship internationally. You will have better luck finding a European seed company in your online search.
The native black-eyed-Susan perennial, Rudbeckia hirta, is typically yellow, yellow orange or with burgundy splotches around the center.
https://www.gardeningknowhow.com/ornamental/flowers/black-eyed-susan/black-eyed-susan-flower.htm