Drizzitiii

Hello guys, I just purchased a 5000D Airflow and am needing a little help with the front connections to my motherboard. I have a Gigabyte Z370 HD3 board that does not have a USB 3.1 Type-C header. I do have an open USB 3.0 header open and am looking for a converter that will allow the USB 3.1 Type-C to connect. I've looked just about everywhere I know but have not found a converter. Any help would be appreciated. Thanks