Hmmm, some are often pretty general or lacking in detail that it is just the general impression of some type of coral. I am not sure how much detail you are actually going for. I would say most of the artificial corals are probably styled after Indo-Pacific corals, but again, don't necessarily have so much detail that they would be unmistakeable...and probably not something people could ID unless they were coral biologists
They are getting better over the years I guess. Are you using these as a project or something that you definitely need Pacific species?
SeaGarden came out relatively recently with their soft collection. I think there is a Natures Image or something like that too. But there is a fair number of them out there if you search for artificial corals or something like that.