Since Visual Studio 2010 is out of mainstream support, finding the installer requires accessing Microsoft’s legacy archives or an MSDN subscription.
Microsoft never released an official “Build Tools for VS2010”. The closest real options: Visual Studio 2010 Build Tools V100 Download
This article explains what the v100 toolset is, why you might need it, and the specific steps required to download and install it on modern systems. Since Visual Studio 2010 is out of mainstream