Product Listing Quantity and Custom Text

[buildingblocks]

Hi

We have column grid layout installed. Product listing > display product quantity, is turned on. The quantity number is sitting on it's own line. To help identify just what the number represents we want to have some text, something like 'In Stock', to the left of the quantity number.
I'm looking at the file includes/modules/custom_template/product_listing.php

in this section

break;
case 'PRODUCT_LIST_QUANTITY':
$lc_align = 'right';
$lc_text = $listing->fields['products_quantity'];


Am I in the correct file and in the right section?

What needs to be added so it will see the define in english.php

I have been experimenting and so far, no luck.

I was able to add some custom text to the left side of normalprice, but how to do it with the product quantity isn't obvious to me.

We are working on zen cart 139b

Thanks