Never mind I figured it out. It doesnt look like the developers are supporting this. In case anyone needs:
1. I changed the word Sku: to Product#: in /public/shortcode/product-view.php
2. Copied the following on /public/shortcode/product-view.php
$item_price = get_post_meta( $post_id, '_ctlggi_item_price', true );
$item_sku = get_post_meta( $post_id, '_ctlggi_item_sku', true );
&
if( empty( $item_price ) ) $item_price = '0';
if( empty( $item_sku ) ) $item_sku = '';
and replaced the price declaration around lines 62 & 68 with the above on /public/pages/includes/cataloggi-products.php
Then to show the sku, I added the following to the same page right after the section that shows the price around line 114
<hr class="cataloggi-hr">
<?php if ( $item_sku != '' ) { ?>
<div class="cataloggi-row">
<div class="cataloggi-col-6">
<?php _e( 'Product#:', 'cataloggi' ); ?> <?php esc_attr_e( $item_sku ); ?>
</div><!--/ col -->
</div><!--/ row -->
<?php } ?>
hope this helps someone