You can download a copy LUK from http://floppsie.comp.glam.ac.uk/download/luk/student-luk-1.0.8.tar.gz and extract the archive contents. Both the download and extraction can be done from the command line:
$ rm -f student-luk-1.0.8.tar.gz $ wget http://floppsie.comp.glam.ac.uk/download/luk/student-luk-1.0.8.tar.gz $ tar xvf student-luk-1.0.8.tar.gz