Bringing this one back - All the makers shown here make a fine product but I did not see my favorite maker John Culina , Culina LLC. While John specializes in S&W J, K, and N frame grips he also makes them for a 1911 and Colt Python. Choice of finishes from tung oil to high gloss; most of his grips are smooth with really nice wood checkering is available. The 1911 grips are std thickness with either a bevel base or square base for a mag well.
Here are some Culina 1911 grips I have or previously had.
Curly Myrtle - High Gloss
Claro Walnut with nice fiddleback and tung oil - these are currently on my SA Ronin.
Bastogne Walnut with satin finish
And; an amazing set of Hawaiian Koa - High Gloss