SA Regimental Standard
Standarte der Sturmabteilung

SA Regiment Munich / SA-Standarte "München"
A red vexillum. At the center a black upright swastika with a silver-black border in a white disk with a silver border. Above the disk the word Deutschland (Germany), below the word Erwache (awake!). Surrounded by a silver black-white-red fringe (except at top). Ratio 5:6. Connected by a black-white-red rope to a red rectangle with the name of the unit (earlier with the letters NSDAP). The top of the staff has an eagle grasping a swastika in a wreath.
The tops of the Deutschland Erwache standards are incorrectly drawn. The eagle has spread wings and not closed. This is also valid for the SS, NSKK and the NSFK standards. I have handled some ten different surviving ones in the process of making the book [England and Spronk 1997]. Most of the original photos in the book come from my personal collection.

SA Company Colour
SA-Sturmfahne

SA Company 11 of SA Regiment 107 / SA-Sturm 11 der SA-Standarte 107

SA Company 1 of the SA Bodyguard Regiment / SA-Sturm 1 der Leibstandarte
N.B.: this canton panel should be blue not black, according to the Organisationsbuch der NSDAP
I have no knowledge of Landesfarben being used by the Gaue. However there were some sort of Waffenfarben, in the sense of a single colour used in the facings, rank patches etc. of Sturmabteilung (SA) uniforms, as well as on the panel shown above SA standards and in the canton of company colours. As far as I know, however, its use in flags did not go beyond this, and actually the whole system of SA Waffenfarben was discontinued in the mid-1930s. Liliane and Fred Funcken's excellent Arms and Uniforms of the Second World War, volume I, shows most if not all of these colours.
The only organization that had colored territorial insignia [in the NSDAP] were the Gruppen of the SA, whose Sturmfahnen had Spiegel ['mirror' — panel in the canton], as well as collar insignia, in the Gruppe colors. SA-Gruppen corresponded to one or more Gaue (average 1.5). Apparently very early on, many of the Gruppe colors had some historical significance, but I don't see any in the 1943 list.
According to Brian Leigh Davis, Badges and Insignia of the Third Reich, SA territorial colours were discontinued in 1938-39.
 

SA Cavalry Regiment Standard
SA-Reiterstandarte

SA Cavalry Regiment 15 / SA-Reiterstandarte 15
A square red flag with the disk with swastika slightly above the center. Above the disk the letters "Nat.Soz.Deutsche Arbeiterpartei", below the letters "Sturmabteilung" and with small black rectangle in canton.The fringe along the fly and the bottom.

SA Cavalry Company Pennant
Sturmfahne eines SA-Reitersturmes

SA Cavalry Company 4 of SA Cavalry Regiment 41 / SA-Reitersturm 4 der SA-Reiterstandarte 41

Unidentified SA Car Pennant