You'll have to build this one, once you are through with your "as-is" collection (just make sure you at least have the Century and ESE Hudsons, and the Southern Tennessean Ps-4). I started with a 1980's Williams brass Heavy USRA 4-6-2 and an old 1940's Lobaugh(?) tender. Train America TMCC/RS.
The Louisville and Nashville had 3 of these stream-styled Pacifics (there were differences between them).
BTW, both below Otto Kuhler-styled. It shows. I don't have the LV locos, alas.