With Jason's photos help, decals for Ρπτ 118469, Elatia Station's water tank ( see here: viewtopic.php?f=13&t=99&start=10 ), have been made.
They'll be soon available from Tasos.
the model comes from Brawa, in various code numbers like 49201, 48897 ect, available at erails
https://www.erail.gr/en/shop/brawa-48897-db-tank/
https://www.erail.gr/en/shop/brawa-49201-db-tank/