It can't hurt to ask! But I think with that one color picture it's a pretty good indication. The Sooner State was a C-2, but the companies usually standardized the major paint areas.
Speaking of Mormacmoon, here she is, a C-3
http://www.us-maritime-commission.de/pictures.php?code=A0063c
KP, I have a Microscale decal sheet with lettering for model railroads. I plan to use that, putting on one letter at a time. I'll make my own for the names and stack insignia.
It occurs to me that I've been working on this for two months, and if it was a kit I'd be at the point where i just opened the box and dumped the parts out. But if I can keep momentum up it should start coming together quickly now.
I still have to build the lifeboat davits. The lifeboats from a NS Savannah kit are just the right size. I'm using the heavy lift booms from a Trumpeter Liberty kit. I won't need them because I intend to build that kit as an aircraft transport version that didn't have the heavy lifts.
PE is from Tom's 1/400 railing, his 1/350 Liberty set, W/T doors, and some other odds and ends.
Then there is the base. Wouldn't it be cool to place this in a case with a Hawaiian Pilot C-3 kit, maybe on both sides of a pier?