Finding older versions requires using third-party repositories, as the official only hosts the latest version.
Before opening or extracting the downloaded archive, run the file through a reputable mobile antivirus app or upload the file to an online multi-engine scanner to check for hidden trojans. To help you get the exact setup you want, let me know:
Highbrow Interactive released an "Indian Train Simulator Lite" for low-end devices. While not exactly 1.1.1, it strips out the modern bloat.