title: Creating a left-arrow button (like UINavigationBar's "back" style) on a UIToolbar
body: <p>I'd love to create a "back" left-arrow-bezel button in a <code>UIToolbar</code>.</p>
  
  <p>As far as I can tell, the only way to get one of these is to leave <code>UINavigationController</code> at default settings and it uses one for the left bar item. But there's no way I can find to create one as a <code>UIBarButtonItem</code>, so I can't make one in a standard <code>UIToolbar</code>, even though they're very similar to <code>UINavigationBar</code>s.</p>
  
  <p>I could manually create it with button images, but I can't find the source images anywhere. They have alpha-channel edges, so screenshotting and cutting won't get very versatile results.</p>
  
  <p>Any ideas beyond screenshotting for every size and color scheme I intend to use?</p>
  
  <p><strong>Update:</strong> PLEASE STOP dodging the question and suggesting that I shouldn't be asking this and should be using <code>UINavigationBar</code>. My app is Instapaper Pro. It shows only a bottom toolbar (to save space and maximize readable content area), and I wish to put a left-arrow-shaped Back button in the bottom.</p>
  
  <p>Telling me that I shouldn't need to do this <strong>is not an answer</strong> and certainly doesn't deserve a bounty.</p>