I don't know of any that actually have more than one internal plug. I would not risk splitting the USB, like through a hub, as that causes power problems. Most devices that use USB actually draw power and they need all the power they get. I personally don't trust hubs, unless they are powered.
This one has two:
2x Internal USB 2.0 Plugs
By the reviews, IT DOES NOT LOOK GOOD. You are taking a chance with that card.
When you buy a USB card, DON'T buy the ones with the ALi chipset, it has numerous problems. VIA and NEC are better chipsets.
Then there is this solution:
Multiple Headers
I think you can unplug the front bay and connect those cables to the front of the case. I don't know whether all of those are powered USB ports, though...Sorry.
~Ibrahim~