I spotted 3 in a building that are no longer in use. They are about the same size as an old electric meter so bear that in mind when it comes to P&P. No charge for the ammeter itself. Obviously I am happy to send them out individually and not as a set.
If anyone is interested drop me an email and I'll get details of them, take photos and take them off the wall tomorrow. It looked like decent gear - they currently sit between the three single phase meters and the disboard on a now removed 3 phase supply ie they are not handheld devices.