I've seen a lot of people asking where to find the level 20 Tradecraft Levequests due to them not being at Moraby Drydocks. After much searching, I finally found them at Quarrymill of all the bloody places. I can confirm at least BSM and ARM are at this location.

It appears there is a good trick to finding the appropriate location for your next level's leves. Go to the city of origin for your tradecraft and talk to the levemete. At least one of the leve's should have a deliverable location to the area containing that levels appropriate leves. Hope that helps!