I've seen it in my Target in regular sizes. It's part of the new better quality version of the Merona line. It's great quality for Target. I bought a dress and a white skirt in the same line. Both are made of heavier material and fully lined. I'm happy with the items I've gotten.
If I remember correctly, the pattern matches up pretty well and it's more of an aline skirt than the JCrew one. It's definitely not a mini.
That skirt has been out for a while, so sizes may be limited. You might have to try a few stores.