Digikey or Mouser
10x 3 Pin A442 Strobe Light Bulb Receptacle Whelen Connector Kit AMP Federal New - $4.00
https://www.ebay.com/itm/164210733790
10x 3 Pin A441 Strobe Light Bulb Receptacle Whelen Connector Kit AMP Federal New - $4.00
https://www.ebay.com/itm/164210755534
Hi Tom
Sorry, I misread that you were after the D-SUB crimp pins in your email.
Digikey has the white AMP Whelen strobe harness plugs and pins as well.