Hauptwerk Virtual Pipe Organ

Does anyone know where I can get hold of Mr. Kruis' organ compositions? I've only found two published books - by "Con Passione" - and they don't include the pieces (Psalm 133 and 115) which I'd specifically like to learn!

[Topic moved here.]

There are only 2 books published:
https://www.con-passione.nl/nl/orgel-notenschrift/koraalmuziek/manufacturer/bert-kruis

Details on
https://www.con-passione.nl/nl/orgel-notenschrift/koraalmuziek/bert-kruis-|-koraalbewerkingen-1-detail
and
https://www.con-passione.nl/nl/orgel-notenschrift/koraalmuziek/bert-kruis-|-koraalbewerkingen-2-detail

Price is € 12,50 (book 1) and € 12,95 (book 2)

If you check this link you will find that Book 5 and 6 have Psalm 133 in them. Not sure about availability tough.
http://www.fransvantilburg.nl/page/bladmuziek

Hans