Found two in the Flint area:
WRCL (93.7 Frankenmuth) targets Flint heavily, yet its 60dBU doesn't cover Flint. It can't upgrade or move any closer due to it being short-spaced to WBCT and CIDR. At least it's a full Class A station.
WOWE (98.9 Vassar) also targets Flint heavily, but it's even farther out than WRCL. To make matters worse, WOWE isn't even a full Class A (only 3kW @ 100m).
Found one in the Tri-Cities: WLUN (100.9 Pinconning), which tries to target the Tri-Cities area, but its 60dBU barely hits Midland and Bay City and doesn't come close to Saginaw.