Main button for a stream radio

[fagan]

I posted this in the 'Items Wanted' forum but got no replies so I thought I'd try here as you guys seem to everything - does anyone know where I can get just the main on/off button for a Stream radio in an '05 Octavia. All the dealers I've gone to say that it isn't sold separately and the breakers I've talked to say they wouldn't take one off a radio even if they had one (which they don't). My current one has discoloured and now looks grey rather than black and it just looks ugly.

It really annoys me that an item that just pulls off doesn't seem to be obtainable without buying a whole new radio.