Try http://hem.passagen.se/opengl/getstarted/ - press ‘GL Includes’ in the left hand side menu. There you will find a set of OpenGL 1.3 compatible headers (not including glaux though).
As Rob said, under Windows you need to treat new functionality as extensions, regardless if it’s actual extensions, or if it’s OpenGL 1.2 & 1.3 functionality. Extension definitions are included in the above mentioned archive.