I've had a tricky time finding information too. If you think there is the possibility that they may be from Mramorak, then I would suggest checking out the Mramorak Church Books on http://www.kiemle-kemle.net/mramorakchurchbooks.html
. The church books from a couple of different towns have been my best source of information in that part of the world. I wish I could offer more suggestions to help you. Good luck.