Removing a background, from behind a photo of a logo

Hi,

I am new to the group, maybe I am repeating a question.

Anyway, I have a photo of an emblem a customer wants engraved.  They can not find an actual B&W file of the logo, but have found a photograph of the logo on a woodgrain back ground. Any suggestions on how to get this down to a black line drawing?  I have tried the magic wand, not having much luck.

Thank you in advance for any suggestions.

Deanna