Whilst you find a number of merchants selling normal instruments you have trouble locating anyone selling something of sufficient quality to use with Verse. A couple of them suggest trying back in a week or two as they sometimes get stuff like that coming in but for now you're out of luck.
OOC:
You can bank the Advantage to gain a Boost die the next time you try to find an instrument that can be used as a Magical Implement within Dawnsmoor but you'll not be able to make another check for at least a week.
As you move round the merchants ward gathering the supplies you need you ask around for Darlane. A number of merchants give you directions to where she normally stays when she is in the city, an inn called the Wayward Wanderer down on the Docks. In short order you find yourself in front of it, it is set far enough back from the river front to avoid the more rowdy trade and looks to be a quite clean and well run establishment. As you enter the common room you can see a handful of patrons being served but otherwise the place seems pretty quiet. An older human woman, her red hair showing signs of grey, is working behind the bar giving instructions to some of the other staff but other than a glance in your direction as you enter she doesn't seem to pay you much mind.