I am trying to design a city map for a session this week. 

I am working on it but with Hurricane Hilary, work and parenting, I may not have it in time. I want to make it a flying city in the fey wyld the size of Waterdeep.  Circular with center hilltop palace and roads like spokes in a wheel.  

If any of you are very quick artists, I could really use the help.  

Need an airship dock, plenty of green, permanent night (drow refuge) and an undermountain if you do a landscape view.

Any help is appreciated.

Thanks from an overworked DM

Have you checked in https://www.dndbeyond.com/forums/d-d-beyond-general/arts-crafts ?

Getting one as big a s Waterdeep may be a challenge, but here, see if this work for you:

https://twitter.com/reclusivemaps/status/1271931754228654081

Also:

https://2minutetabletop.com/bluberrey-sky-city-maps/flying-city-map-large-preview/

I'd suggest redesigning the session. Plan it around the materials you have, rather than the ideas you have. That way you save yourself some time and stress running around trying to find something. You also limit the risk of taking something that isn't what you want or need.