there does not seem to be any such animal.
Other options would be to run the cable out the back and use a 19 pin to usb adapter to plug that front bracket up to one of the rear usb3 ports... which i don't like ... esthetically, and practically....
or get one of these:
and hook it right into one of the PCI express ports (which was one of the reasons the guy recommended this board over another I was considering)