What servo arm do I need for an ACE servo?

[Krawlin]

I've got a pair of ACE DS1015 servos that I recently bought, and want to get some aluminum servo arms for them. I only have stock ones and Hitec arms, and the Hitec ones don't fit so that rules that out, and I can't seem to find the answer I need with searching..... so does anyone know what type of spline the ACE DS1015 servos use? Are they JR or Futaba or Airtronics or KO?