RGS dispatch sheets

Scott, are there still reasonably intact sets of RGS dispatcher sheets, and if so where. I am curious because many many years ago I purchased a single sheet from the Colorado Railroad Museum, which makes me wonder how many sheets might have dispersed that way, and what is left. While individual sheets can be fascinating, what I think is even more important is the pattern over time which is lost if a lot of sheets are missing. Like an idiot I used mine on my desk top under glass for many years, and eventually all the bright light caused the ink to fade to the point of being illegible. Not even sure if I still have it.

JBWX