Hi Drew,
I haven't found any luthiers with a LOT of Alembic experience in Chicagoland, but I have used Rick Cremer in North Aurora to dress a low spot on my fretless Epic when I got it off of Ebay 3 years ago.
The closest long term dealer is Uncle Bob's in West Allis WI, the Chicago area dealer started repping Alembic earlier this year.
There are four or five Chicago Alembic players that have been on the club site, myself included.
What kind of work are you needing?
Mike
P.S. I'm playing at Synergy II in West Chicago tonight, using my maple fretless Epic and my Koa '81 Distillate.