private function get_products_for_cat( $cat, $include_bundles = true ) {

		$products = array();

		foreach ( $this->data['items'] as $item ) {

			$cats = array_keys( $item['categories'] );

			// Exclude bundles if bundles are not being included or requested.
			if ( 'bundles' !== $cat && ! $include_bundles && in_array( 'bundles', $cats ) ) {
				continue;
			}

			if ( in_array( $cat, $cats ) ) {
				$products[] = $item;
			}
		}

		return $products;

	}