The items that fit your Isuzu Grafter / N-Series / Elf are shown below.

The Isuzu Elf is known also known as the Grafter in the UK market and as the N-Series outside Asia.

Models with original radios have Mitsubishi style plugs, where as others have ISOs and radios fitted by their local importer (usually Clarion or Kenwood models) - some models have 24 volt electrics and will need a voltage dropper to change the radio.