I looked at RAMI grips for a long time... many are G10.
I finally switched out the stock rubber grips with the CZ-USA honeycomb.
They aren't aluminum, but they have that "cold" feel in the hand and an excellent roughness... not TOO aggressive, but very grippy. All black, they offer a slight upgrade in style, but won't draw too much attention. They feel slightly thinner in the hand than the stock grips. The CZ honeycomb grips came with some cool "star" head screws and a star tool/wrench. They also included tiny rubber washers so you can put a serious crank down on the install.
Hope that helps