First, XAS is a project from China, all the dev team members are Chinese, so it is a little hard to be listed on some international exchanges. I think you can seek some help for buying XAS on its official forum:
http://bbs.asch.so, or you can post on its ANN thread:https://bitcointalk.org/index.php?topic=1880303
BTW, XAS is an undervalued coin in my opinion, maybe it will be another NEO in the next few months.
That is right, the XAS is similar to LISK, but the price is really nice, I have bought some XAS with the help of my Chinese friend, and I will hold them as a long term investment.