Molex
There are more types of Molex connectors out there than Carter has pills.
Some are not made any more or are very hard to get such those on older avionics units.
The best way to ask this question is to ask for the connectors for a specific unit, i.e., "old school" Whelen strobe systems.
Or call the manufacturers for part numbers. Then order the connectors or pins from Mouser. Mouser has an extremely good online catalog or you can get one from them. The prices are a fraction of what you would pay from some resellers like SkyGeeks.