The guy who made the recordings and produced the records - Bud Edmunds - passed away several years ago. I remember getting a postcard a few years ago from his heirs stating they were selling off the remaining stock of record albums. As I had all of them I wasn't interested.
His recordings of old DRGW and C&TS are not the best in the world, but they have some historic significance. Be carefull of his liner notes, as there are some "sneaky" things done to pad out his records. You would be interested to know that part of this 483 recordings are in reality 484. If you listen carefully, 483 and 484 have distinctly different exhaust sounds, 484 is much more square. More obvious is the whistle on 483 back then and 484's whistle were rather different.