Many creators release "Beta" versions or private links via YouTube channels (e.g., subsim, Hrail) or Facebook groups like "Indian Train Simulator Lovers." These are often the places to find the most modern, high-detail reskins (like the Vande Bharat livery).
This is arguably the most significant repository for Indian content. msts indian train addons
The community relies on specific repositories for free, high-quality content: Many creators release "Beta" versions or private links