The wing bars have been discontinued by Yakima for a long time.

You can order the factory rack from St. Charles Isuzu (do a search to get the contact info). Or you can get it from isuzuparts.net. St. Charles' prices tend to be a little bit higher but they don't charge for shipping. Better service too from what I hear. I've ordered from isuzuparts.net and they don't answer phone calls or emails... if your order doesn't show up... you just keep waiting until it does.