Just in case you were looking for a North American source, Voxel Factory (across in Montreal) has some LAYWOO-D3 in both 1.75mm and 3mm diameter filament listed.
They also carry the Taulman 618 Nylon, so one of the “Expert Packs” listed off the main page may be of interest: http://www.voxelfactory.com/
Disclaimer: They gave me some free samples of the LAYWOO-D3 to test in my MakerBot Replicator just before Christmas (see http://www.flickr.com/photos/aplumb/8279921330/in/photostream), but otherwise I’ve purchased everything else I’ve received from them.
http://www.voxelfactory.com/collections/printing-materials/laywoo-d3