The short answer is, not really. There are some online resources for IDing zoas, but they tend to be wiki-like (user submitted), so people submit their stuff under whatever name they bought it as. So there will probably be entries for BOTH CB Orange Hornet and Orange Oxides, and it'll be up to you to decide if they're the same. FWIW, I have seen CB Orange Hornets in person (bought directly from CB), and I own Orange Oxides. They're the same, even the guy who owned the CB zoas thought they were the same after seeing mine.
You can't even really trust pictures you see online a lot of times. Do a Google Image search for, say, Grand Master Krak. Now, in person I'd bet most of those zoas look pretty much alike. But, in pictures... so much color variance. Especially because of lighting, color saturation, etc. Some sellers are HORRIBLE about Photoshopping pics to make things look way different (Better?) than they do in person.
There are a few Facebook pages where you can post a picture and ask for help with a zoa ID, but I've seen one post get 8-9 different IDs and none of them (IMO) were correct. It's a crap shoot.
For Hornets specifically, I've been collecting them for a while now, so I've developed a bit of a network of people I've bought from that I trust. I'm also familiar with their pictures online compared to what I've actually received, so I have a good idea of what stuff will look like in my tank when it arrives.
Zoabrary is a Zoanthid Library to help Identify Zoanthids and Palythoas
www.zoabrary.com