Thanks for giving this extra information. Yeah I think you can DEFINITELY get good help closer to home. The thing is there are many therapists who read and absorb the different approaches and incorporate them in their work. Someone who is at the top of their field will have basically heard of this even if they don't have formal training.

The confusing thing about "mentalization therapy" (the UK one right?) is that it basically stresses attunement, and reflecting feelings, which are components of EVERY therapy. You might be able to find a therapist who is naturally better at doing these things than others. I don't know how to describe it but some people are just talented at getting in others' heads. I think most therapy has an element of mentalization to it. Good luck finding something close(r) to home!