Unfortunately it appears that most of the sims are somewhat biased in the list of models they offer. The producers of the most popular ones have affiliations and the models they offer for the most part follow those affiliations. For example, the H9 PTS model is one you'll probably not see in any other sim than one with a Hangar9 affiliation. That would be in FSOne. I don't believe it's in the initial release of that one however. It does offer a H9 150 P51, however.

OK, I took a moment and did a Google search and found a site that is selling the FSOne addon for $40 and actually listed the 10 models that come in the addon (I couldn't find any mention of the addon on the HorizonHobby site. Must not have used the right search words.). The FSOne addon has that PTS in it.

As for Great Planes Real Flight offering it, nope.