Newark.com or alliedelec.com would have what you need. We use connectors like that here at work. They have a semi-loose mounting setup on the metal with a beveled guide in the connector to seat the pins. It can be off by a slight amount and still have the guide make the connection. However, they really arent suitable for repeated cycles. Just my opinion, but I wouldnt do what you want to. Servo connections are just too important to experiment with. Hand plugging it makes you look at the connectors which helps keep track of their conditions.
Edwin