Thousands of user-made vehicles and tracks are available on community hubs like Re-Volt Zone.
If you are looking to play Re-Volt on Windows 7 today, there are several "modern" ways to do so that ensure compatibility and provide the Russian localization you're looking for:
The Russian "Rus" versions are typically community-made patches or original 1999 localizations (like those by Akella). Most modern installers like RVGL allow you to swap language files or include Russian text and UI options.