Yes, they are in Freeport, and it's in the update notes, i believe, who to see - might try The Arcane Academy. And the payoff was VERY good...they apparently took into account the interdependencies, and I received 1g 8s for a tier 2 writ that also gave nice guild xp.
It appears to vary by what you are asked to make. A friend got a tier 2 cooking writ and only got a few silver, but then cooking (provisioner) has NO interdependencies, they only have to buy coal and stuff.