I haven't removed the pins/wires from this particular connector, but I have on quite a few others on the bike .
The pins have a spring tab, that prevents the wire from backing out of the connector when the the two halves are mated up .
The method that I have used, is to get a small diameter tube or electrical butt splice that just fits over the pin, push the wire from the backside of the connector to get the spring tab free, push the tube or whatever you have onto the pin to compress the tab, then you should be able to remove the wire and pin from the connector .
Parts for the connector are not available, unless to have a spare to rob parts from .