I have few DNN websites for plumbing services. I have noticed Wordpress website developers use plug-ins for rating/review microdata implementation, that interact with Google and their websites have rating stars showing underneath the organic search result. I have implemented some rating/review microdata in the header section of an HTML module on my home page, which Google's Rich Snippet Testing Tool confirms it works, but the stars never show up in actual google search. What I am talking about looks the same as if you have linked your Google + page and it shows your google review count, but in this instance you don"t have to wait to reach certain amount of reviews, you just make them.

Is there a Dnn extension that I can use to get rating stars showing in google search?