Hi all, just got a used Mokka X and discovered that the screw-in aerial is 1" too high for the garage door. The screw thread is 6mm x 0.75mm (a fine thread). I bought a shorter e-bay "special" supposedly for a Mokka but the screw threads supplied are 6mm x 1mm and obviously don't mate. Typically the Vauxhall dealer isn't interested, does anyone know where I can get a 6mm fine-threaded aerial?