Front panel audio internal dac?

I know that there are usb dacs but I'm not sure if what I'm about to describe exists. If it does, can someone link it to me please? What I want is an internal Hd audio header cable to usb 2.0 header cable. You would normally plug the hd audio cable into the hd audio port on the mobo, but instead you plug it in to one side of this probably fictional cable,and the other side plugs into an internal usb header on the mobo. Bam, internal dac. Does it exist? Could it exist? Thanks.

I don't think it exsist but it's a great idea. You could probably do a case mod where it's implement into the front.