Hi TechnikerHannes, and welcome to the site.
These were two expansions created back in the early days of Carcassonne (say early 2000s) by Friederich Scholta but are no longer available to download. They might be some of the ones that were sold through eBay, or similar, at the time - a practice that is now actively discouraged.
I created a document listing known information about these, and other, lost expansions, that is available from the Downloads section on the site. It includes screenshots, images, rules, and other information where these have been found. The only way to get these tiles would be to create them from scratch yourself, although some of the tile configurations (cities and roads) are found in later published expansions or other fan expansions. If you want to see my document, there is a discussion thread about my search for some of these expansions at ...
https://www.carcassonnecentral.com/community/index.php?topic=3065.0or direct download from ...
https://www.carcassonnecentral.com/community/index.php?action=downloads;sa=view;down=613If you have more info than I have recorded for these expansions, please let me know so I can update my document. Many thanks.