Tough one - Cold calling / play audio message through to voicemail

I want to use GB to create voice message(s)... and be able to play it through to a recipeints voicemail (if I get it) when making cold calls.

SCENERIO - With a pre-recorded audio file of my message... when I get the customers voicemail - I could manually click or play that audio (through a headset or speakers) ?? - so that my message ends up on their voicemail.

There's gotta be a way to do this......

TIA