I know K Line made F7 or F3 C&O units.
MTH made:
RK E3 AA units - 30-20101-1
RK E8 AA units - 30-2998-1
This seems like the best deal - F3 ABA - 30-2851-1 from 2008
It shows 2 dealers have them in stock -
GRAND CENTRAL LTD.- LINCOLN, NE
B & E JUNCTION - YORK, PA
They look real sharp!