You can do this via google Adwords. It is possible to target selected websites as long as they are in Google's network (Display Network using AdSense).
You will need to use managed placements which lets you target specific sites and even down to individual pages in these sites.

You can read up on managed placements here.

Placement targeting tool could assist you further in helping whether the domain you want to target inside Google Display Network will accept Google ads or not and how much impressions you should expect out of that. Similarly additional info like what ad formats can also be analyzed using that tool.

Read more about the tool in this article.