Based on Bryan Howerton's Identification, the Origiona Companies in McRea's Battalion would have been.

61. Capt. James H. Hobbs, Co. A, McRae’s Battalion.
65. Capt. Edward B. Knott, Co. B, McRae’s Battalion.
64. Capt. David A. Stuart, Co. C, McRae’s Battalion.
60. Capt. Joshua L. Hollowell, Co. D, McRae’s Battalion.

The Numbers are the item numbers in the McRea Papers.