On the results page on line 377 you have:
<img class="WADAResultThumb" border="0" src="http://outofchaos.net/gsc/www/gallery/images/product-images/<?php echo($row_WADAproducts['Small_pic_Name']); ?>" alt="<?php echo($row_WADAproducts['']); ?>" width="150"/>
You can update that to use https:// instead of http:// right there on the php page.