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!
Today, we need a nation of Minutemen, citizens who are not only prepared to take arms, but citizens who regard the preservation of freedom as the basic purpose of their daily life and who are willing to consciously work and sacrifice for that freedom."
-- John F. Kennedy