Yes, Eaton bought them and rolled them into Cutler Hammer. If they are not able to help, the SERVICES division of Westinghouse was bought by Siemens and rolled into Siemens Industrial Services. The often have data on older Westinghouse equipment that C-H may no longer retain. But that Siemens group is a contract based organization so they will likely want a contract to dig out the data.
Where can I find Time Current Curves for old Westinghouse Equipment circa '85 to '90? I am doing a Coordination Study for a facility using Westinghouse PRL 1 panelboards.