If you were to download this version of Bodhisattva-caryavatara (the #1 above) to your computer, I believe you'll be able to access the links to the footnotes interactively. It worked when I did it, but right now I'm not sure if it's because I set it up as a .PDF file. If it works, please enjoy. :-) Let me know too.
The Flight of the Garuda (a slight re-visioning, with permission of Keith Dowman)