Person-centered therapy goes way back. Pretty much "all" therapists say that they treat clients with basic empathy, genuineness and unconditional positive regard. Many therapists go beyond that to include additional steps or methods to do, for example, CBT, psychodynamic, etc. I think you might ask for "pure" person-centered therapy. You can see it online. On youtube search for the "Gloria" session with Carl Rogers. Rogers created person-centered therapy, also known as client-centered therapy.