fisher is a good vocalist,infact he's my favourite vocalist...
but does anyone have any instrumental versions of their songs?

You mean are any of their songs Instrumentals or do we have any versions of them playing the songs without any vocals ?

There's two instrumentals that Cannibal Corpse have done in their history: 'Relentless Beating' from Vile and 'From Skin to Liquid' from Gallery of Suicide. However, I have heard an instrumental version of 'Frantic Disembowelment' from the Wretched Spawn.

Where did you hear that ?

The DVD of the making of the Wretched Spawn, you big silly.

I also heard that they played 'Frantic Disembowelment' and the majority of the tunes at the Philly show (when George couldn't play) instrumental wise.