As per subject. The only reliable source I know of at present is as follows: http://kaictl.net/software/proggyfonts-0.1.tar.gz Note that Kai maintains the package in the Arch User Repository.
The homepage is dead, too. What's worse, it redirects to what looks like a scam site.
+ 21 Feb 2015; Ben de Groot <yngwin@gentoo.org> proggy-fonts-1.ebuild: + Use Gentoo mirrors since upstream vanished