When you said "This was my great grandfathers rifle." did you mean the exact rifle illustrated in the picture? Or did you mean your ancestor simply had a similar marked gun?
The reason for asking is that the pictured half-stocked gun is listed as in the current collection of Bill Ivey, the author of the book, so I doubt that rifle would be available. Bill's getting a few years on him, but he's like the rest of us highly focused collectors... not ready to let go of the stuff we love yet.
If you meant that you simply want to find a similar marked gun, which might be either full- or half-stocked [you can't get picky when looking for a specific North Carolina rifle since they are rare], then perhaps Michael Briggs will see your post and respond here.
Michael is a major North Carolina collector who has done numerous high-quality publications on the state's gunmaking schools and probably knows where more NC guns are than all the rest of us put together. Are you out there Michael???
Shelby Gallien