Thanks Richard. The pump should be same as civvy spec 110, but the civvy had the three bolt box till early Defender era I think. It wouldn't have surprised me if the army had persisted with the inferior three bolt box though, since it is only on the sixbys and RFSV variant.
I'm not so sure about the pump outlet being modified though. The outlet on my 110 goes straight to a 90 degree fitting to give clearence to the box, but even then is barely 5 mm from touching by memory. The fitting may be special but the pump is more than likely absolutely stock Isuzu part.