Yeah, I know that this is a really weird question, but... Many years ago, I purchased a three-ring binder (and the rings are D-shaped, not round) and the binder came with a slipcase that is covered in white fabric. The binder cover is 12" x 13" and the binder is 3.5" tall. I use this binder for storing negatives and slides, in holders, and I could use another. But, I purchased this so long ago, I have no idea where I got it and I cannot find branding of any sort on it. Can you offer some ideas as to what this is and/or suggest a product to purchase? If it would help, I can always take a picture of the binder and port it. Thanks!