[Plugin: WooCommerce – Excelling Ecommerce] Displaying A Banner On Shop Pages

Hi, i’d like to display a different banner on each shop page. Currently i’m trying to use the ‘<?php if (is_page(’28’)) { ?>’ query and concept, and placing this in the header so the image appears directly under the header content, however, it does not seem to register on the woocommerce shop pages set out. Does anyone know why or how to remedy this? Thanks!