HJEdman, I just went to the RenderMan Repository, found the Mike King link and clicked on it. When I got the page it looked like there was nothing there. However, I was at the bottom of the page and when I scrolled up there were his files. This seems to be the case for all of the shader pages.
I would not be comfortable sending you the file. It is Mike King’s work and although there is no copyright information on the page. I am going to error on the conservative side and assume that he has some rights reserved.
I hope that I hear back from you when you have finished the tutorial. I just finished up converting Stephen H Westin’s velvet shader using the tutorial and it works! Below is a test render. It is the first time that I have truly convinced myself that the dress is made of velvet.
Click thumbnail to see full-size image