Herschel, I found them at Steve Earle Products and Buffalo Arms but neither provided drawing. I'm not interested in buying them I was interested in just the design and how everything works together. I was a little surprised when there was no information in any of the 1903 books on them. I will say though that the I like the way the color-cased block look that are sold by Steve Earle Products; reminds me of case colored lever action rifles.