their website ( ::: link deleted ::: ) has in script on the upper left corner "Replica de Isetta" and in their gallery is nearly the same exact car (unassembled) that you posted. According to their website, they sell a Romi Model and a BMW Model. There is also a picture of three-wheeled English version, although there are no specifics.
In terms of replicas the only other company mention is the now defunct British firm Tri-Tech, under the model name "Zetta", sold a kit car or even an assembled complete BMW Isetta lookalike replica from modern parts