Criar uma loja online

I need a theme for prestashop! the only change we need is in the product page, this page must not have anything besides buy a custom button that will send !, because you need to create sales letters for e-books in html, and the default page of this me messing up, so I need that this page is only amended (product page) for all content that will add to it will be created for me in html thank Tadeu