I have been collecting the 2010 Harper Collins Tolkien B-format trade paperbacks (image not mine) but have been unsuccessful at finding the right copy of Unfinished Tales.
Unfortunately all B-format paperback editions of this book share the same ISBN number, regardless of the year they were printed making it seemingly impossible for online retailers to sent me the correct edition.

I'm looking for this edition with the Ted Nasmith illustration

but so far have been sent this 2014 edition instead and this 1998 edition.

I've tried Amazon, Abebooks, and Ebay but because because all these sellers depend on electronic cataloguing they can't guarantee that they'll send me what I'm looking for.

I've also exhausted all the used bookstores in my neighbourhood. The fact that this 2010 edition has only recently left the shelves has been making it challenging to find used.

Any tips on tracking this one down?