Need help to find a WP/Woocommerce coupon plugin that work with product addon

Hi all
First time posting here.
We are currently running a WordPress+WooCommerce site with Flatsome theme.
And we are looking for a coupon plugin that could work with the WooCommerce add-ons.
The idea was simple, we want to provide some coupons to our loyal customers which will make specific add-on part of the parent product become free.
However, we could now find any plugin could achieve that so far. So instead of going into the endless buy-test-refund circle, we want to seek help and advice from others first.
If anyone here had similar experience, or any idea which plugin that can fit us, please give us some advises!
Any idea will be appreciated! Thanks in advance!