To check where to buy the Terminal, Housing & Crimp. What are their spec / model / brand?
I want to use for my 2014 Dyna Rear Turn Signal Light.

 

Those look like AMP Multilock .040.
Your local dealer should have the parts.

 

The service manual has a listing of every connector used also. In case the dealer doesn't have stock, digikey.com usually has them all. Easier to call them once you know the connector, then use their search. They have about a billion items.