range rover classic power steering conversion

Hi ,I need to replace my 3 bolt power steering box on my 1976 classic ,was hoping to use a 4 bolt box that i have and use a famous four hydraulic union conversion fitting (FF003936 ) ,this converts imperial to metric thread on the box but have found out that famous four do not sell them now ,this means that everything else is still imperial, Do you know where i can get 2 fitting that will convert my system

worst case....get a hydraulic pipe made locally with the ends you need on it.