Help for product image rollover in woocommerce

Hello, we use for our e-shop the theme Bridge with Woocommerce.
I’d like to know if it’s possible to replace the “white overlay” effect on product image when the mouse is over with a second image rollover (from the product’s gallery).
It seems this theme doesn’t allow it and I’d prefer not to add external plugins.
Is there any workaround, or CSS or, if we have to, a plugin that can do that?
Is it possible to ask the theme’s authors to develop this feature?

Thank you for any help you can provide.

yes, you can suggest the theme author.

How to contact an author: