Looking for old/dummy Vectronics collars

Hi everyone, 

I'm building some small audio attachments to pop onto Vectronics collars.

Does anyone have dummy or non-functional Vertex Plus 1C, 3D, or 4D collars that they could send to me in the UK for me to test around?

The electronics can be completely goosed & I will pay for shipping.

Cheers in advance, 

Kas