The only things you will probably find in this area is maybe some off the shelf fixed gears (Pista, Langster, Madison, Sanchez, Bowery, Rush Hour, etc.) at a few shops. They probably won't have more than one or two in stock at most. I can only comment on the AA shops as I go to them the most. Great Lakes carries the Swobo Sanchez, Cannondale (Capo?), Felt, and Giant. I remember seeing a Sanchez and a Bowery I think. Ann Arbor Cyclery has a Raleigh Rush Hour, One Way, and Bowery on the floor. Two Wheel Tango has a number of the city edition Langsters at the Jackson RD. store.

I doubt any store has a track frame/fork in stock except maybe a Steamroller or a Pake. But, all of them could order you something through QBP, BTI, etc.