Looking for organ music scores from the Baltic states?

Just before I was getting ready to water my hedge this morning, an organist friend of mine contacted me asking if I know of any Latvian organ music scores and music from the Russian region of Kaliningrad. He has some organ music by Mikalojus Konstantinas Ciurlionis, who was the most famous Lithuanian composer and painter and for the Estonian part he will be playing a piece by Arvo Part.
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So I looked at my library and I found two volumes of organ music published by Barenreiter.

Latvian organ music volume consists of pieces by Johann Gottried Muthel, Georg Michael Telemann, Adams Ore, Nikolajs Alunans, Jazeps Vitols, Jazeps Medins, Alfreds Kalnins, Peteris Vasks, Aivars Kalejs and Atis Stepins.

Estonian organ music volume consists of pieces by Rudolf Tobias, Artur Kapp, Mihkel Ludig, Peeter Suda, Alfred Karindi and Edgar Arro.
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From the Lithuanian side I also found a recently published volumes of organ music by Mikalojus Konstantinas Ciurlionis and Ceslovas Sasnauskas:

There is a collection of Lithuanian modern organ music "The Road to Silence" which I can't find easily at home and I hear National Association of Organists will be issuing a new edition of complete organ works of Juozas Naujalis. In "The Road to Silence" there are pieces by Giedrius Kuprevicius, Jeronimas Kacinskas, Algirdas Martinaitis, Onute Narbutaite, Vidmantas Bartulis, Donatas Prusevicius, Egle Sausanaviciute, Feliksas Bajoras, Gracijus Sakalauskas and Jonas Tamulionis.

Good luck to anyone who is going to play some organ music from the Baltic states!

Now I have to run to grab some lunch and practice organ duets in the church with Ausra.

​If you know of any other collections from this region, please let me know.