i think the easiest way would be to go your local australian slack mirror
http://mirror.pacific.net.au/linux/slackware/
and there select "slackware source" here are all the source packages and the slackware specific build scripts. (these can probably also be found on the original authors project page)
you can use the these packages to install from source on another distro,
or you make a distro specific package for easy installation.