It may be on thinkstock via StockXpert. Now the artist got 25 cents instead of a few bucks. Bummer.
It's labeled as iStockphoto on Thinkstock, not Hemera.
Without knowing why the photographer closed their iStock a/c, if they've terminated the agreement, iStock/Getty shouldn't be selling the images anywhere at this point. I understand their intra-site interfaces are broken, but that doesn't alter their legal obligations.
My guess is there are some weasel words in the agreement that says they have some "reasonable" amount of time to remove the files. Given how useless their software is, that could be many months...