What you are looking for is called here in the U.S., MSDS, acronym for Material Safety Data Sheet (recently it has changed to just Safety Data Sheet: SDS)
Since you are interested in the 2015 DS model, I BELIEVE the attached SDS is the right one for that battery technology:
"The chemistry used is Lithium Nickel Manganese Cobalt: LiNiMnCoO2 (NMC) - Also know as NCM, CMN, CNM, MNC and MCN".
The above quote came from this forum, in a thread started in January 2015:
http://electricmotorcycleforum.com/boards/index.php?topic=4280.50I then Googled "LiNiMnCoO2 msds" and the attached PDF came up.
You can also write to Zero and explain to them what you need and they might provide it to you. My searches on the Zero Web site for the SDS were unsuccessful.
General inquiry: inquiries@zeromotorcycles.com
Support: support@zeromotorcycles.com
If Zero does not respond, since the battery cells are made by Farasis (farasis.com), you can email them at: support@farasis.com and see if they can provide you the SDS.
Hopefully, the shipper will be satisfied with the one I found but just to be on the safe side, contact Zero and have them get you the official one.
Good luck importing your bike and have fun with it!