While there is no single "official" download portal, this specific piece of content is typically hosted on community enthusiast sites and Russian modding forums. Based on common modding repositories, you can find similar files at:

: If this is for the Trainz Simulator, creators often upload RAR files of CKD models to the Trainz UP forums .

: This site often hosts specific Russian tram models like the Tatra T3R for the GTA series. You can check the GTA-Rostov Tram Section for Volgograd-specific liveries.