Welcome, Love her, so glad you reached out for support. It's clear from your username that you want to love and support your D through her challenges.
Have you tried using the "Find A Therapist" feature on the
Psychology Today website?
At the top, they have a menu called "Find A Therapist". Enter your location, and then under the "Issues" menu that appears, you can select "BPD". And/or, under "Types of Therapy", choosing "DBT" will likely narrow the list down to those with experience working with pwBPD.
Let us know if you need some more suggestions, and again, welcome;
kells76