Yes, they almost certainly are. There are many avenues to finding sober roommates, such as the ones mentioned above. You might find a sober living room through an alumni network, word of mouth, the internet, calling a hotline, a 12-step program, a local church, or even through a sober living home.
Many people would like to rent a room to a person pursuing sobriety. Try the many options mentioned above, and you’ll likely find somebody soon.