Grab the “newest” (2008) http://www.lua.org/ftp/lua-5.1.4.tar.gz
unpack it. Compiling with VC++ is very easy.

Open the x64 %comspec% /E:ON /V:ON /T:0E /K “C:\Program Files\Microsoft SDKs\Windows\v7.0\Bin\SetEnv.cmd” /Release
or x86 command line
%comspec% /k “”C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\vcvarsall.bat”” x86

browse to lua folder and run

etc\luavs
copy /y src\*.* .\

Done!