So if you do not sell repair parts, and are suggesting that the poster call the manufacturer...
I have one major question::::
Who manufactures Defiant LED Flashlights?
It is not Defiant Infustries, I checked.
Please understand that you are talking to regular people who offer advice on FixYa forum, not to Coleman.
You could check with your local historical societies or museums.
I had an outfit that the wires were too short and if there is enough length cut the wire and get a longer piece of wire. and solder it together. taping the open wire.
I had one I took the connector that goes on the battery and fastened on a longer wire and soldered them together. Only do this if you understand what you are doing.