I think these might be the JST style connectors (see my post in the 'building your own sensor track thread). If I have time I'll look and measure 1 of mine to verify. It's probably a different series than what's in the sensor track because if my memory serves these connectors seem larger.
But my memory may not serve, so I'll measure.
Depending on how many sets you have to make it may make sense to consider buying a crimping tool (about $36 plus shipping). The connectors and pins are pretty cheap and you can build a cord as long or short as you need.
In the interest of full disclosure, I've not made any JST cables yet. I'm getting ready to order the tool, pins and housings and I'll post my experiences when I get them.
Nick C.