Si Klegg raises a very good point, right on the money as well.
One should remember that Confederate officers were just as fastidious as their Union counterparts in their dress, many were well to do with a big enough bill fold to afford a frock coat. That being said it should also be pointed out that in 1864 the C.S. Army changed the rules and for the first time allowed officers to outright draw an enlisted man's uniform in lieu of the previous rule mandating they provide their own uniform out of pocket. As the War dragged on officers on both sides learned that fancy double breasted frock coats and shell jackets with gold trim, (Union the gold border of their shoulder boards, Confederate, their Austrian knots on their sleeves), tended to get said officers shot. After said realizations by observant officers, more than a few started to take preventative measures, with some Union officers removing the gold border of their insignia, and wearing sack coats like the enlisted men, with some even wearing ad hoc collar insignia and Confederates wearing shell jacket with smaller less obvious collar insignia and no Austrian knots. Of course that doesn't mean all officers adopted those practices, more than few, indeed the majority clung to the fancy stuff.
If your dead set on wearing an enlisted man's shell jacket with officer insignia for 1864 I personally see no reason to say it didn't happen, especially since that was the year it became officially acceptable in the Confederate Army, just remember it was a Confederacy, and the native state was theoretically responsible for the equipage of troops from their state. But I would also like to point out that just because an officer was wearing a shell jacket, didn't mean he didn't have a frock coat, they would keep those for nice occasions, and as keepsakes after the war, (original C.S. officer frock always seem to outnumber surviving enlisted man's uniforms), a good example of this is the McCleaver uniform in the former Museum of the Confederacy, consisting of a well worn, shell jacket, vest and trousers, and a not so worn double breasted frock coat, all privately tailored, (well maybe not the trousers, but probably).
For a N.C. officer wearing an issue shell jacket, I'd say the Royal Depot, or any other N.C. depot jacket would be sufficient.
EDIT: Since your asking about a colonel, I'd say and enlisted man's jacket would have been rare, I missed that key word in my original post. What I had said applies to field officers, as in Major on down, Colonels were basically staff officers, to see enlisted issue jackets with insignia, would have been very rare, they might have worn shell jackets, even depot made ones but they would have been modified, as in added branch of service trim, etc.
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and can attest to the obscure information that can be found therein - including the Requisitions for 4 yds of cloth and buttons described above by @tullock What's the name of this Colonel you need to know about @18thmississippi and what battle are you specifically looking for?
Bringing the