The only thing I can think of is ebay. I wanted the Graphic 45 Steampunk Debutante collection, which is discontinued. I have an ebay seller nearby that I have found discontinued papers from before and she had everything I needed. I'd say you just have to keep checking around.
The other thing is, that looks a lot like something you could make with the cricut ornamental iron cart (or ornamental iron 2 possibly). You can cut stencil material with the cricut so you could probably make something similar. If you don't have a cricut, a lot of times an LSS will have one and carts you can use if you purchase the paper/stencil material for it.
Thanks for the suggestions! I do not own a die cutting machine, but do have a LSS so I will check there per your suggestion. Have repeatedly checked on ebay with no luck but will continue searching there as well.