I do not know much VAC Lab Monitors - but I know the units are hard to come by, as well as the parts.    It came from working environment and if it does not work for you I will refund.  

Stock up on all your spare parts right here, for cheap.  

In this lot there are :

-4 PCB Boards from VAC.

-2 PCB Boards from other companies (Trident and Octagon Systems)

-2 KIP Valves

-3 other components (if you know VAC Monitors you will know what these are for)

Comes in protected boxes.