NeXT question

I need to test a few NeXT monitors, and I assume that I can not hot swap the monitors, what with the Power button turning on the monitor and the kb and mouse going through the monitor. Am I thinking correctly here? I was thinking about building a breakout box for the monitor, sort of a 'Y' cable thing with only the video going to the second monitor. Of course the first thing I need is three 19 pin D connectors. The connectors are not listed in catalogs, DigiKey, Jameo, Altex, etc. Were these connectors custom made and only used in the NeXT? Anybody ever seen 19 pin used elsewhere or have any idea where I might find some? I had originally thought I would just wait until the testing turned up three bad monitors and then use the connectors out of those. I then decided to build the breakout box before I get started. Sort of a Catch 22, I need to find three bad monitors to build a breakout box to test the monitors. Mike