Can you be more specific with what you are looking for, in terms of what you are aiming to use it for or a price range? If price is not an issue,
SteelSeries makes a headset that fits your description. It happens to be quite expensive though.
Like you, I also was not able to find a card hub with that many ports, but one possible solution would be to get a USB hub with multiple ports and then get a number of 3-4 port card hubs.