Part for bread board jumper wires?

I wanted to make up some of my own custom length solderless breadboard jumper wires.

Anyone know where I can buy ends like this?

http://blog.makezine.com/MKSEEED3-22.jpg

They look to me lke they’re moulded on, which means that you would have to make a mould and get some plastic (or possibly epoxy) and make your own. Are those the jumper wires sold at the Maker Shed?