Is there a Thunderbolt PCIE Card for Gigabyte Z390 Arous Pro that works with High Sierra

I have been lookin around and I can't really find anything. I want to be able to have at the minimum thunderbolt 2 in my mackintosh system. Is there a specific PCIE card on the market that would work with High Sierra? I have a 9700K with a gtx 1080.