The 75B SA uses the same grips as the rest of the 75/85 series. The only differences in the grips among the 75/85 series is that the compact models all take a smaller grip (fortunately, all of the compacts take the same one).
I am absolutely convinced that the best grips for the 75/85 are the replacement rubber grips sold by CZ-USA for $19.00 +S&H. They cost more than the Hogue mono-grip, but they give me the best handling, grip-index, and comfort. Superficially, these are identical in appearance to the OEM plastic grips on the commercial guns, even down to the CZ logo. However, the shape of the rubber grip is subtly different, has a palm swell, and is much more comfortable for it! I have these grips on my SA and Mil, and they really were an immediate improvement.