Looking to Add Inquire Here button too Product page

Hi, I am using the Brine family template. I am looking to add a button that when clicked it opens the form in light box mode to contact. The button would be called Inquire Here. I have already Disabled the Add to Cart button from the product page using CSS Code. Thanks 

Edit. If it would be easier I could add the same button to the Header so that way it still shows up on all the product pages. 

@paul2009 sells an extension that will do exactly what you need.

https://sf.digital/squarespace-product-enquiry-form

Also if you're using the Brine template then you shouldn't need CSS to disable the add to cart button. You should be able to disable it in the Style Editor. 

https://support.squarespace.com/hc/en-us/articles/212838128-Brine-Site-Styles-tweaks#toc-products