In the first prototype PCB version we did have PCB mounts for a shielding can around the analog front end, but they were later removed from the layout since we didn't notice any noise problems without the shield. As you already mentioned, the whole board can also be shielded if it becomes an issue. The PCB size is a standard Eurocard format (100x160 mm), so a matching size metal enclosure is not hard to find. For the new version we will also provide an aluminium enclosure.