Patrick Gavin of Text Link Ads sent in a newsletter promoting a new batch of TLA Affiliate Banners. The sample shows the $100 Free Promotion ad. Save in your machine, here the linking instructions:

http://www.text-link-ads.com/starter_kit.php?ref=21887 (replace 21887 by your TLA referer ID)

According to him, these set of banners are high performing and have been converting very well. Will give this one a try and see how it goes.