First chance would to correctly identify the scene, which can be done easily by going to the Brazzers website, look for the name of the actress, list all of her scenes and find it there, just like this:
Then you could use that information to find the scene on the web, just like this:
Destiny Dixon Teaching The Teacher
fapxl.com
Free hd porn videos
pornve.com
Enjoy the world's best porn videos in high definition on the Brazzers channel for free. Watch your favorite Brazzers' pornstars get fucked hard on Redtube.
daftsex.com
Sit back, relax, and enjoy the hottest porn scenes featuring hot babes with big tits and dripping wet pussies getting fucked, all FREE on Brazzers,
www.ceporn.net
or maybe someone on here could upload the scene for you:
Gofile is a free, secure file sharing and storage platform. With unlimited bandwidth and storage, you can easily store and share files of any type without any limits. Our advanced features, such as CDN support and password protection, make Gofile the ideal choice for individuals and businesses...
gofile.io
(720HD version, couldn't find the 1080 because it's so old)
As for the latter question, Brazzers scenes can be found on many sites. Streams easily, downloads depending on the release date of the scene, in this case almost 7 years ago. So it's no wonder it's not available on every site because they usually focus on the new stuff.
Naughtyblog (nablog.org) HiDefporn (hidefporn.ws) or XXXStreams (xxxstreams.org) used to be good for downloads, but they are all using crappy file hosts so please beware of that. Most sites are "streaming only" these days.
Hope this helps. Enjoy!