if you have gone the ball lock route I would look on craigslist or ebay for more kegs. You can never have enough. And if you are doing a fridge conversion 2 or 3 kegs is desirable. Check http://www.homebrewing.org/ for faucets, fttings and kegs in sale page or spring cleaning page or of course go to your local homebrew shop.
You will never go back to bottling! Enjoy your free time!