Enquiry about anything (not only woocommerce products)

I’m working on a website that sells products but not directly through the site.

My client wants that when a user visits the site he will be able to select a product or multiple products which are stored in a floating box and visible to the user along the all site and in the end the user sends is questions about the products he selected. It’s like a add to cart but only for enquiry and with the floating box.

So far I found these solutions:
– https://codecanyon.net/i…/woocommerce-request-a-quote/6460218
– https://codecanyon.net/item/woocommerce-quote-request-or-enquiry/9197016
– https://wisdmlabs.com/woocommerce-product-enquiry-pro/

The problem is that none of them has exactly what I need and they all are for the woocommerce plugin and I want to be able to insert the add to enquiry button anywhere on the site for example on a portfolio item.

Has anyone had a similar problem?

I’m using the Avada theme. Appreciate all the help you guys can give me!