Generally you will have to buy them to fit the specific manufacturers 1911 Model unless they are built to the standard specs of the full size Browning/ Colt 1911 Design. Many companies keep their specs regarding grips pretty much standard to the Colt 1911s. Then of course you have the full sized 1911s and the Compacts which take different grips than the full size.
The Constitution is not an instrument for the Government to restrain the people. It is an instrument for the people to restrain the Government!
“Americans have the right and advantage of being armed. Unlike the people of other countries, whose leaders are afraid to trust them with arms.”
James Madison. Author of the 2nd Amendment