Debian netboot Wheezy - ihipop/winsun_mininas_v1 GitHub Wiki

http://ftp.debian.org/debian/dists/wheezy/main/installer-i386/

In the above page, three links available. The first one is for wheezy (at least for netboot).

http://ftp.debian.org/debian/dists/wheezy/main/installer-i386/20130430/images/netboot/