Prestashop add-to-cart button (ecommerce with processwire)

[Kass]

Hi everyone,

Does anyone know how I could insert an add-to-cart button (of a product from Prestashop) onto a Processwire page? The add-to-cart button should then lead the user to the checkout page of a Prestashop installation. The user should be able to select the product quantity before adding-to-cart. 

I am aware of simplecart.js but I do not want to use it because of its security flaws which I've read about. I'm also aware of Padloper but it doesn't really suit my needs.

I saw a thread about this topic posted in 2014 but it is a bit older now and provides no conclusive answer :

Thanks for any help

Kass