There is one in private ownership in NI, one restored by the RUC Historical Society, there was one at Beverley & some ended up at Otterburn.
PS I have in the past referred to the comment about the pump operator having to wear a respirator. That was from a SITREP that was clearly slanted against the design of the vehicle.
Did you get the 17/21 Lancers Triton tie? I once saw someone with one who was working for Anchor must have been 10-15 years ago.