Simplify Buying Process

Kentinada

So I currently write blog articles featuring photos from my website. I got the great tip here from @denisegoldberg I believe to actually use the html code from the Share option on my site when I put that in my blog article which is hosted on Google Blogger. Cool. Works great. But once I've posted the article on my blogger, the very next thing I do is tweet out a link to the article and share the article on my business FB page. When someone sees the post on FB, I want them to be able to click a Buy Now or Show Now CTA button and go directly to that photo/product on my website. But apparently FB only allows CTA buttons on paid Ads. Has anyone found any better way to do this here?

Thanks.