Is there still a repository for debian etch packages?

Solution 1:

All Debian releases are archived at archive.debian.org, so

deb http://archive.debian.org/debian/ etch main non-free contrib
deb http://archive.debian.org/debian-security/ etch/updates main non-free contrib
deb http://archive.debian.org/debian-volatile/ etch/volatile main non-free contrib

deb-src http://archive.debian.org/debian/ etch main non-free contrib
deb-src http://archive.debian.org/debian-security/ etch/updates main non-free contrib
deb-src http://archive.debian.org/debian-volatile/ etch/volatile main non-free contrib

(And if you need a package that never went into a stable release, go to snapshot.debian.org.)