Add RSS icon in aggregator.module

So I'm trying to put a rss icon on each headline in my aggregator that will link back to the originating site's feed. I can get the icon to show, but it links back to my site instead of the feed link.

Here's what I have in my aggregator.module (4.5.2) Anyone have any ideas on how to fix this?

/**
 * Format an individual feed item for display on the aggregator page.
 *
 * @ingroup themeable
  */
 function theme_aggregator_page_item($item) {
   static $last;
  global $user;

   $date = date('Ymd', $item->timestamp);
   if ($date != $last) {
    $last = $date;
    $output .= '<h3>'. date('F j, Y', $item->timestamp) ."</h3>\n";
  }

   $output .= "<div class=\"news-item\">\n";
   $output .= ' <span class="date">'. date('H:i', $item->timestamp) . '</span>';
   $output .= "  <div class=\"title\"><a href=\"$item->link\">$item->title</a> ";

   $output .= " <a href=\"$feed_url\"><image src=\"images/rss_small.gif\"></a> ";

   $output .= "</div><br>\n";
   $output .= "<div class=\"body\">\n";
   if ($item->description) {
     $output .= "  <div class=\"description\">$item->description</div>\n";
   }
  if ($item->ftitle && $item->fid) {
    $output .= "  <div class=\"description\"> </div>\n";
    $output .= '  <div class="source">'. t('Source') .': '. l($item->ftitle, "aggregator/sources/$item->fid") ."</div>\n";
  }

  $result = db_query('SELECT c.title, c.cid FROM {aggregator_category_item} ci LEFT JOIN {aggregator_category} c ON ci.cid = c.cid WHERE ci.iid = %d ORDER BY c.title', $item->iid);
  $categories = array();
  while ($category = db_fetch_object($result)) {
    $categories[] = l($category->title, 'aggregator/categories/'. $category->cid);
  }

  $output .= "</div>\n";
  $output .= "</div>\n";

  return $output;
}

Thanks,
Jeff