I believe datamancer still does - that is to say, the group of artisans currently known as datamancer (not Richard R. Nagy, who sadly has passed away). They still make them, and you can still order them, but I kinda doubt that they would be open to a group buy type of thing.
Richard Nagy passed away (AKA Datamancer) but he also ran a workshop with multiple artisans which was also called (Datamancer). Though Richard has passed, the workshop is still running and still has the brand name Datamancer. They also still take custom commissions.