Mutliple Taxonomy Endpoints

endpoints.php

<?php

add_action( 'init', 'wps_lords_add_endpoints', 15 );
/**
 * Lord's Endpoint addition for Manufacturer and Category Combination
 *
 * @uses add_permastruct()
 * @uses add_rewrite_rule()
 */
function wps_lords_add_endpoints() {
	$shopp_manufacturer = get_taxonomy( 'shopp_manufacturer' );
	$shopp_category     = get_taxonomy( 'shopp_category' );
		
	add_permastruct(
		$shopp_manufacturer->name . '-' . $shopp_category->name, 
		"{$shopp_manufacturer->rewrite['slug']}/%$shopp_manufacturer->name%/{$shopp_category->rewrite['slug']}/%$shopp_category->name%", 
		array(
			'with_front' => false, 
			'ep_mask' => EP_NONE,
		) 
	);
	
	add_rewrite_rule( 'inventory/manufacturer/([^/]+)/category/([^/]+)/?$', 'index.php?shopp_manufacturer=$matches[1]&shopp_category=$matches[2]', 'top' );
}