Wrestling belt line art help urgent !!

Hi all , 

first off I love this forum it's just what I needed . But sadly yes I am a noob . I'm good at Photoshop but I have no idea with Corel draw . 

What I'm trying to achieve is a line art drawings of wrestling belts . It needs to be black and white as I will be using it as a resist for etching on to metal . I have no idea how the hell to do this I've tried power trace and everything . Any help would be great . 

Im trying to turn the top image into the bottom image . 

 

Thanks in advance