Greetings to a fellow FCMer and thanks for the inquiry!
You ask a very good question. I would like to see a searchable directory of chalk artists here on the Loft too but have not quite figured out how to set one up. The structure of a forum makes such a directory difficult to include and maintain.
However, I can point you to a directory that is already established at www.ChalkMart.com.
Click on this link to see the directory:http://www.chalkmart.com/custom/index.cfm?id=171413
I know some of the entries in the directory need updating but I think David LeGrand makes changes as he is informed. Although the home state (or country) of each artist is listed, that can be misleading. Many are willing to travel quite far from their home base. I was just talking with chalker Gary Means yesterday who lives in Pennsylvania but is currently on a 12 week ministry tour through Florida.
Near the bottom of the page is an area called Artist Bureau
and if you click on the "Looking for an Artist" link it will only give you this email address to make inquiry - firstname.lastname@example.org
Or, you can do this directly from the Artist Bureau page at www.EternityArts.com
This description is found on that page:"If you are looking for a chalk artist for your ministry event, or if you are an artist who would like to register with our Artist's Bureau, click on the appropriate link below to email us. We will contact you to obtain pertinent information so that we can provide the best 'ministry match' possible."
Also, since you are in the FCM I'm sure you know about the "Search For Entertainers in Your Area" on the FCM website at this link: http://fcm.org/usa/search.php
One downside - the database only includes members of the FCM, and most chalkers I know are NOT members of the FCM. For instance, I just used that search to look for chalk artists in Michigan. There are probably 8 or 10 chalkers in Michigan but the search results only showed 2.
Finally, whenever I discover another chalker with a web site I list it here under Chalk Artist Links: http://www.chalkedandamazed.com/#chalkers
Maybe someday I will add a state abbreviation with each listing.
Anyway, hope this is of some help,