Thanks, John,
I've been thinking of purchasing the "ivories" and "jigging" them myself with a dremel tool and then darkening the cuts. I bet I could make them as nice as the ones I've seen but can't seem to purchase.
Rich, Hollywood holster maker Andy Anderson is credited with making McQueen's rig for Magnificent Seven movie. He is no longer in business, as far as I know. Here is some interesting trivia about the production:
http://www.imdb.com/title/tt0054047/trivia
Some interesting trivia of my own is that I visited the location as a young kid just after the movie was made. All I knew at the time was that a "cowboy" film had recently been made there. We were visiting to climb to a local piramid which is halfway up the mountain, but the village and locations were still there.