I came across another tomato seeds selling site in Germany, it is called 'Irinas Tomaten' and it is run by a husband / wife team (hubby German, wife from Russia but speaks distinctive Bavarian German
.. I saw an interview on YT) .. They have a farm and produce most of their available seeds from plants they grow each year.
She has also written a tomato cookbook 'Tomaten Meine Leidenschaft' (Tomatoes, My Passion) but what really looks interesting is this bag, featuring several heirloom varieties:
https://www.irinas-shop.de/tomatentasche-p-10931.html
What a sweet gift idea, and I am tempted to order it for myself...
Has any of those tomatovillian in Germany read her book or purchased any seeds from the site?