Obtaining a red tag will not help you as the red tags are individually coded to their module. Refer to the description below:
2. Imbedded Security System (ISS) – Passive: Fitted to VS Series 3 and VT Series 1 vehicles.
Has three barrel shaped keys (two black and one red) which can be plunged into the key pad in the glove box. This system does not require the black barrel key to be plunged on start up. The red key is used for introducing new ignition keys or additional black barrel keys to the ISS. If no red barrel keys are available to introduce new ignition keys then the black barrel key will need to be used every time the vehicle is started. If neither red nor black barrel keys are available the complete ISS system will need to be replaced. ISS red keys are not available separately as they are individually coded to their modules and can only be purchased as part of a complete ISS kit. Therefore if an owner needs a new ignition key but cannot provide the red barrel key the only option can be to remove and replace the ISS system. Dealers should try to ensure that when trading in or selling any of the above vehicles the ISS keys are passed on with the vehicle to save your customers and Service Departments inconvenience.
GEN-F2 GTS, VS Clubsport 185i