Is there a way to return the SKU meta value into "mp_product"?

I read this thread: https://premium.wpmudev.org/forums/topic/php-call-for-sku

and was able to get it working, but I would like to have the “SKU” meta returned as a part of the mp_product template tag rather than as a separate item outside of it. Specifically, I would like for it to be a <h4> tag under the title. Any help would be greatly appreciated. Thanks!