In case it serves as a guide for the European metric track material, it is very old, from 2008, there is a pdf in the download section of Ibertrainz of the material that existed at that time in the DLS. http://www.zatovisualworks.eu/ibtz/downloads/?cat=32
I don't know if they will work on Trainz 2019.
Authors of German material in the pdf:
Vasquez ....kuid:121945
gerd .........kuid:72730
Mr.Kevin ....kuid:139683
niezbo .......kuid:211427