Payware:

https://store.steampowered.com/app/325962/Train_Simulator_Three_Country_Corner_Route_AddOn/?l=german
https://www.3dzug.de/product_info.php?language=de&info=p549_railjet-advanced.html
https://www.3dzug.de/product_info.php?language=de&info=p276_verkehrspack-gueterwagen.html
https://www.rsslo.com/product/talent-obb-4024/

Freeware:

https://forum.railworks-austria.at/wcf/filebase/index.php?entry/13-%C3%B6bb-eurofimawagen/