How to get SKU to display as with size and weight in Additional Information Tab?

My client wishes to display their product codes ideally under the “Additional Information” tabs alongside the size of the product Variant, or anywhere else applicable to THAT variant of the product. As the client does couches, the issue is each couch is made up of components and each component is loaded as a “variant” with its own SKU. As they deal with trade in a B2B environment, the customer would like to see the SKU before placing an order for an item (we are using the a3rev Quotes and Orders plugin for this), and it seems that the “WooCommerce / Settings / Products Data / Product Fields” options only allow you to enable the SKU and not to actually display it on the product page anywhere as with size and weight?

Can you assist me find a work-around that won’t be overwritten with every theme / WP update? Running latest WooCommerce 2.0.20. Demo site being developed at: http://comfort.underdogdigital.net.