Hi again!
The problem was that no custom fields were actually selected to search on the general options page, so I examined a product and added a few related custom fields to search: http://i.imgur.com/3hVdeR9.png
Also I see you use a custom field as well to store images, so I changed the image settings according to that. The post content field is empty for this custom post type, so I chaned the description field to the “prod_featured_text”: http://i.imgur.com/kfYMjQI.png
This way both images and a proper description will show 😉