I have a few, some in good shape, and some for parts. There are different models, but they are all similar. For more information have a look at this page
Rolls Safety Razor Page
You can't get factory replacement hones, but the blades can be honed (by hand) on regular stones. I'm just starting to experiment with using 1/8 inch thick hobby plywood and diamond pastes in various grits for doing honing and stropping using the Rolls mechanism. I'll post more when I have completed my work.
When tuned up, they give a great shave, and are such a high quality item that they are a pleasure to handle. I always feel like I'm supposed to be packing a steamer trunk for a trip on an ocean liner when I pull mine out. Heavy, nickel plated, and a joy to hold in the hand. Ebay is your best bet for a good price.