Hi guys,
Abi posted a link to a german online wood shop that sells different woods. They also sell bog oak. I'm not sure if it's the same as morta but if it is you might be interested in it. Although the pieces might be a bit to small. But they might have some laying around that is not posted on their page. Here's the link:
http://www.edelholzverkauf.de/index.php?cPath=108
Have fun,
Pär