You don't really need a breaker bar. Just get a piece of long pipe that will fit over the handle of your wrench. Go to a plumber with your wrench and he might be willing to sell you a two or three foot scrap of iron pipe for just a few bucks. And like I said, the Pedro's tool on eBay is so cheap, you're better off buying that instead of wasting money trying all sorts of makeshift setups that may or may not work. You've already blown a few bucks on the bolt and washers and it didn't work. Here's the tool:

Pedro's New in Package BB Socket Holder 6460210 Free US SHIP | eBay

Use Buy It Now on Monday and it'll probably reach you by Thursday or Friday.