Go to "photos" on Houzz. Enter "modern fireplace" in the search box. When you find one you like, click on the photo and information about the photo will appear. Click on the info you need.
I hope this helps.

You could also post this question again in the design dilemma section. Many more people will see it there.

Also what is the style of your house or the look you are after?

Did you solve your design dilemma or find an answer to your question?

Very, very few designers monitor the Other section of Houzz, which is why it took so long for you to get a reply.

If you desire design advice, please post this again in the Design Dilemmas section, preferably with as many photos as possible. You will get the best suggestions that way.