Those electrical connectors are readily available, but you did not mention the if you want to use 'standard or nota universal. end connectors.
If you use the internet search feature there are many sites supplying military male and female connectors for every country's military or civilian use, When I wired up my recovery truck trailer I actually use a Russian truck female and male connector (mounted the female on the back of the truck) and the female end wired into the trailers harness, The reason I used them was because they are 'screwed together' connections rather than 'push in'. Just my preference. There are many to choose from. original or otherwise. I just had those from a Praga truck I dismantled. Look on e whatsit as well.