Ok so, Slackware doing upgrade to 15.0(finally! yay) and SlackBuilds.org temporary suspended;
I've decided to create my own temporary git atleast for tauon-music-box right now,
and might add up some extra packages on it
You can find any necessary information here: https://github.com/RSKYS/TauonMusicBox

Packages already exist, but they're old. I have to even takeover some later!
Just make sure you cloned repo at "/var/lib/sboui" before!
by $sboui -s

Now,
$git clone https://github.com/RSKYS/sbo
Replace new packages I've put at git in your for example sboui path.

$sboui
Then hit / and type tauonmb

Now simply let it upgrade all.
Cheers! ~red.