There's one here, but it's a litte High $$.
http://www.gunsamerica.com/91010178...an_Wesson_1911_AI_Classic_Commander_45ACP.htm
My CBOB is a 10MM. I purchased it on GB and I got screwed. I had to have the whole thing redone as it was subjected to what my Smith called "kitchen Table" gunsmithing.
It's all done and much gooder, or is it goodlier, anyhow it's beautiful and it shoots great.
My first trip to the range after getting in back from the Smith. 25 Yards. A little sight adjustment and I'm good to go.