Changes in build model years, keep the third party manufacturers of accessories and
cases, looking to the new product market; so ones made a few years ago no longer are.
Some companies may have new-old-stock, or clean condition pre-owned; given there
has been changes to the shape of the MacBook/Pro case and port locations, the new
cases won't fit and are scarce. Demand is toward fulfilling the newer model's design.
Some of the actual resellers, not auction or one-of offers by individuals, may be able to
locate cases & accessories for models no longer in production. But, the trail gets cold.
edit: in the past some of the google located items had come close to the goal, though
the stock varies and there isn't a stockpile of them available now; it is hit or miss:
https://www.google.com/?gws_rd=ssl#q=mid+2010+macbook+pro+13+inch+protective+cas e&tbm=shop
I've attempted to help others looking to locate correct fitting cases for older MacBook
models, and other than the rare Amazon seller or some other long-time reseller who
happens across some new-old-stock from some other supplier warehouse, there isn't
much of anything out there. And I'd be wary of buying from some china-direct sites
online because you cannot be certain of the site security or what happens to your info.
Scarce inventory, or virtually no inventory, is a big part of locating out-of-production items.
Sorry to not be of much help; perhaps another may reply with more information on this.
Good luck & happy computing! 🙂
