Has orders of battle for 1940, of course, but also for North Africa in 1942, i.e. a big chunk of guys who subsequently joined the CEF.
Goum: Insignia of the Goums [French]
Sumner, I., and Vauvillier, F. (1998). The French Army, 1939-45 (1). The Army of 1939-40 and Vichy France. Osprey. [Men-at-Arms 315].
Sumner, I., and Vauvillier, F. (1998). The French Army, 1939-45 (2): Free French, Fighting French and the Army of Liberation. Osprey. [Men-at-Arms].
Reda says these are the most valuable sources. Everything is described especially colours, etc…