HUD didn’t come until 2021, but there’s only one part number for it- 68381578AC.
But, there’s a bit more to it than that, and being that you have a RHD conversion, it might not be feasible to do. The dash cover is different for the HUD. The cowl above the instrument cluster is raised to allow clearance of the HUD unit, and there is a “bucket” in the dash that the HUD mounts into. The windshield is also different to allow the projection of the HUD, and I’m not sure if it’s just on the LHD side of the windshield, so a RHD version of that windshield might not exist either.
You also need the correct instrument cluster, that has the extra port that the HUD plugs into.