The drakkar we used:
1/180 Smer Models Drakkar Oseberg Viking longship

Actually this a rather bad model for several reason:
1/ Plastic is really cheap (fragile)
2/ The model is not historically accurate
3/ The model assembly is really a pain
4/ The ship sailing is engraved with a very ugly sea monster; I had to fill it with green-stuff and re-sculpt the sailing to something nicer.
Still, this is the ONLY 10mm drakkar available and it scales perfectly to Warmaster...