I'm sure FLATSIX has been taken....there's just no way it would still be available in IL or any state.
I just put my order in (CAL DMV) for:
ORC 986S (Orange Coast Region 986 S)
I'm a member of the Orange Coast Region in Zone 8 of PCA.
Perhaps you could do something similar.
Check out your region:
http://www.pca.org/regions/regions.asp?Zone=13
KRZ