The magazine can send you copies of the photos, and probably will if you ask. Send an inquiry to them. Since they have legal ownership now, that is the best source without stepping into the spider’s web of show photographer rights and relationships.
I will hazard a guess that the unofficial photog is trying to walk between the raindrops of contracts and custom, as it were. She may have over-promised when she offered to send you the photos. She can’t, really, if she sold them. She shouldn’t based on not stepping on the official photog, but only because of her own pro status. If she were an amateur it would probably be different.
And, yes she may have stepped on the official show photo when she sold photos she took at the show. “Selling” means to anyone, including publications, in many instances.
AND … she doesn’t want to go too far and perhaps get chucked out by the show organizer the next time she visits. Photos of the show are in a magazine, but they were NOT taken by the official show photog. Theoretically that shouldn’t happen unless the photos were offered free (and maybe not even then). Thank goodness for her it’s in Europe and not many here will see it.
But none of that is your problem - who can publish what and where. That’s between the pros and the show organizer.
As I understand it, there really isn’t any legal action the Official show photog or anyone else can take if someone does sell photos from the show. The agreement is with the show organizer. It’s the organizer who is on the spot to legislate what the other photogs do, and the only means of doing that is to make it uncomfortable for them, up to the point of barring them from the grounds to stop any further photography. I suspect that’s what your unofficial photog is trying to manage while also selling those photos.
Great story! Calvin is a wonderful horse, glad I read about him. 