If you've got Slackware 14.1, all Terminus fonts are in /usr/share/kbd/consolefonts, sizes ranging from 12 through 32.
If you're running an older Slackware either upgrade it or do this:
bash-4.2$ lftp -c "mirror ftp://ftp.slackware.com/pub/slackware/slackware-14.1/source/ap/terminus-font/"
bash-4.2$ cd terminus-font/
bash-4.2$ su # type root's password when asked
bash-4.2# ./terminus-font.SlackBuild # Then after the script says Slackware package has been created:
bash-4.2# installpkg /tmp/terminus-font-4.38-noarch-1.txz
You will get the same fonts.
EDIT: Sorry, I overlooked you wrote that you're running Slackware 14.1 I hope this can help others though.
EDIT 2: Just run the "setfont" command to try and when you're satisfied with the result edit /etc/rc.d/rc.font accordingly.