Yaasher Koach eswinter. I also had the zechus to discuss this matter with Rav Forchheimer. A few years ago, this Inyan was discussed in the Lakewood List Frum telephone directory.
The Yom Kippur “Kiddush Bracha” is found in the Maariv Shemoneh Esre (Artscroll Ashkenaz) page 88, “…Mikadaish HaShabbos v’Yisrael v’Yom HaKippurim.”