We'll create fresh WordPress site with WooCommerce Search By SKU installed. You have 20 minutes to test the plugin after that site we'll be deleted.
Woocommerce Search By SKU allows you to be able to search for prouducts by their sku number. If a full sku is entered then the page is automatically pulled up. It also works to search SKUs in the backend. It does all this while maintaining the normal search functionality.