Please refer to ubuntu packages for the original source.
Modifying debian/changelog and debian/control only in order to push into PPA.
You can find the package in here.
deb http://ppa.launchpad.net/shihta-kuan9/ppa/ubuntu trusty main
deb-src http://ppa.launchpad.net/shihta-kuan9/ppa/ubuntu trusty main
To execute following command for the key.
apt-key adv --keyserver keyserver.ubuntu.com --recv A516424C9964B059