Thanks for the decent presentation. As a supplier of new and used T & M equipment, Eurias (in the Netherlands) still has a few of these VBF8 filter instruments in stock. At a price level that is well below the price tag on newer models. There are VBF8 variants with elliptic sharp roll-off, and also a few more with a 8-pole Butterworth response. These are listed in the webshop that Eurias operates, and they can be configured on order to either 120 VAC or 230 VAC mains supply.