Extension Registry

Is there anywhere I can save a single file containing the current OpenGL Extension Registry documentation; the equivalent of what’s currently at -
http://oss.sgi.com/projects/ogl-sample/registry/

which is annoyingly split into hundreds of little pages?

As far as I know, there is not.
Vendors usually provide a file with all the extensions they support but they usually support only a subset of the extensions listed in the extension registry.