Comment 13 for bug 322210

You can just download the source of cups: apt-get source cups and get the dymo.ppd file from there. It is located
in the ppd subdirectory and called dymo.ppd. At least for the dymo 400 (which I have) I can say it works ok.

More detailed instruction can be found at:
http://www.miek.nl/blog/archives/2009/10/31/dymo_400_label_writer_in_ubuntu_jauntykarmic/index.html