Print it, glue it, sand it, stand it. Add some M3 set screws + 5mm M3 square nuts to secure rear IO.

These are the parts that I used to get the rear IO forwarded:
https://www.amazon.com/gp/product/B081JPBJJJ
https://www.amazon.com/gp/product/B075DBT9M7
https://www.aukey.com/products/4-port-usb-c-hub