As Drew said
"That model is getting old, haven't seen one like that being sold new for at least 6 years, as they released the blue alloy case model in July 2011-ish "
Mine died 18mths ago ( valving in head broke ) and ARB could not supply spare parts, basically they said that they are obsolete and do not support them any more. Had a good run out of it over the time and replaced it with the new blue one