Not sure which supplies you want to avoid buying. If you've already got a soldering iron and solder, or know someone who does, it might be quicker to just buy two leads with single male connectors and solder them together. Places like Balsa Products
http://www.balsapr.com/ have them for less than $2 each. You might also check with some of the people who sell bare wire and connectors to see if they'd custom make them for you.