Hello Stasys, Skypilot here. Looks like it is just two cables, both shielded, running through one common casing. If you can measure the gauge of each wire, then this site, which is absolutely full of parts and supplies, may have your answer. Hope this helps! Regards, Skypilot
http://www.mouser.com/Wire-Cable/_/N-5ggl/ I apologize, but the site wouln't let me post a direct link to this section, so if you would copy and paste, it works, I double checked.
P.S. If there is any part number whatsoever on the existing cable, I would personally try the search for number cross over first, for there are literally thousands of possibilities. Good luck!