Where to Get Herman Miller Burdick Group Parts?

Well, no Herman Miller retailer (that I've been able to locate) sells parts for Burdick Group furniture any longer. H-M headquarters does not have parts either (believe me, I checked). The system was discontinued some time ago. It was exotic and not a high-volume item. Some still carry one or more Burdick dining tables, but parts cannot be found. You have to search the web to find whole desks, and sometimes you can find parts on auction sites. Questions?