[Plugin: WooCommerce] Shop page image place holder. Need help.

Hi, I would like to set a placeholder images for the shop page.

I want to be able to pic one image, and have any products that do not have images set, to automatically show this placeholder image.

I have achieved this on the single product page by using the ‘woocommerce customizer’ plugin, but it did not do it for the shop page.

I am trying to do this for https://www.orbetinternational.com/shop