Classic Arms Snake Eyes Pistol

Question
My niece inherited this pistol from her father.  It is missing the main spring on the left hand hammer.  I'm trying to locate one to put the pistol back to working order for her.  Any ideas?

Answer
Hello Greg.
  Your firearm is still sold as a 'build-it-yourself' kit by Dixie Gun Works. You might try ordering a spring from them. If you do not have the shooter's manual, they may be able to help you with that, as well. I can tell you that it shoots a .36 caliber round lead ball, and is to be used with black powder only.
  Thank you for asking for my help. Charles Gage