Radio Shack might have that. I had to repair a similar connector for my son's robotics controller about two weeks ago.
I wandered in with just the parts that were messed up, and didn't lose heart when the kid working the counter admitted his only training was in cell phone sales. It might be hard to drag the vending machine in, though maybe you can get just the connector into the store.
The kid was helpful in that he did open up a couple of packages of connectors for me, so I could figure out which ones matched up, and then taped up the ones that didn't match and put them back in the case.
Plus, they had the crimp pin extractor tool which I needed as well.
Here's I guess what I'm trying to say ... you may not need the plastic connector piece, if it is undamaged.
If you push out the pins with the extractor tool, and then match up the pins for size, and then crimp the wires back on to the pin, and push the pin back into the connector, you are good to go and you only need to replace the pins ... which Radio Shack probably has in store.
Extractor tool is less than $10, pins are a couple of bucks a pack.