I'm working on modifying my Mac Pro 5,1 front panel to add a couple of USB3.0 ports, but to do so I obviously need a USB3.0 PCIe card within an internal header so that I can run a cable from the card to my modified front panel. I've seen plenty of PCIe cards that have internal headers, as well as plenty of Mac Pro compatible cards, but none yet that fit both requirements. If anyone has recommendations for a suitable one, that would be great.