If you have 50 TMs, you can a Razor Claw (only one) from the Scientist near Route 15 in Tapu Village.
If you got that one already, then no, the only other way of obtaining one is capturing a wild Jangmo-o, Hakamo-o, or Kommo-o holding one. Or you can have someone trade you one. :P
Source
Hope I Helped!