Thank you for your input. I do have a conundrum...
I would call my collection a "thematic" one. That is, rather than collecting many pieces of one pattern, I'm collecting single settings of many patterns, often one piece at a time for rarer patterns. This collection does not lend itself to storage in a standard silver chest or in wraps, in part because, if stored that way, I cannot quickly see what I do and don't have.
What I would love to find is cheap "liners" for individual settings, such as these:
The "amorphous" one is actually better because it's more flexible. I don't suppose there's anything out there that consumers could purchase that would be similar.
In the meantime, I've been storing them in zip-lock bags to keep them from getting mixed up. I've done this for several years with no apparent effect, but I worry about the long-term consequences.