Copies of naturalization records can be obtained from the county courthouse. If I still lived in Kansas, I could do it for you, but I live in Maryland now, and make it back to Kansas a couple of times a year. Perhaps I can find someone still living there to get a copy. Would you want a hard copy mailed to you? The alternative would be a scan to create a pdf or image file that could be emailed to you.
You may also want to check the web page for neighboring Decatur County to see if you find anything. The URL is http://www.skyways.org/genweb/decatur/index.html
I also informed some others who either live in Rawlins or Decatur counties or have ancestors who lived there of your search for information. Perhaps they can also help you. I will be in touch when I know more.