Releases around mingw-w64 Toolchains targetting Win32/Personal Builds/mingw-builds/5.3.0/threads-posix/sjlj/i686-5.3.0-release-posix-sjlj-rt_v4-rev0.7z on SourceForge
Maybe you can find something interesting in this list
mingw-w64
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Toolchains targetting Win32/Personal Builds/mingw-builds/5.3.0/threads-posix/sjlj/i686-5.3.0-release-posix-sjlj-rt_v4-rev0.7z