Add default iThemes Exchange product image

functions.php

<?php
/*
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Add default thumbnail for products on Store page
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*/

function custom_exchange_default_product_image() {

	if ( ! it_exchange( 'product', 'has-featured-image' ) ) { ?>
	
		<?php do_action( 'it_exchange_content_store_before_featured_image_element' ); ?>

		<a class="it-exchange-product-feature-image" href="<?php it_exchange( 'product', 'permalink', array( 'format' => 'url' ) ); ?>">
			<div class="it-exchange-feature-image-0 it-exchange-featured-image">
				<div class="featured-image-wrapper">
					<img alt="" src="IMG-URL-HERE.jpg" data-src-large="IMG-URL-HEREjpg" data-src-thumb="img-150x150.jpg">
				</div>
			</div>
		</a>
		
		<?php do_action( 'it_exchange_content_store_after_featured_image_element' ); 
		
	}
}

add_action( 'it_exchange_content_store_begin_product_element', 'custom_exchange_default_product_image' );