Spruce-East is indeed at FFC. Great little airport with lots of GA activity on the SW side of Atlanta.
Pull up to the FBO and park. Then you have to decide to walk about 10 minutes to the Spruce location which is just off the airport property, or call for the van.
Say, Hello" to Tim, Patrick, or whoever happens to be behind the counter. They're all great and will really work hard at finding your obscure parts/pieces and try to save you money.
Spruce is a great company with great people. I can't say enough good about them.
(No. I have no connection other than a pleased customer.)
The ATL class B airspace has recently been modified. No problem getting in/out of FFC, but be aware.