Yes, Battlenet 2.0 via the mods pannel in the year 2020. There are thousands of models provided by mods there for you to choose from.
Ok sorry if you think I am being rude. The fact is there are virtually no models for Starcraft II yet because the game is only 2 weeks old today. Only now are alpha and beta versions of plugins needed to model coming available and they are still mostly unusable. The model you found might have been the only currently working custom model in StarCraft II.
Also modeling takes time, good models take skilled people weeks. Yes some people will make them but they are few and far between so you just have to be pashient.
Wait a few months, there should be a dozen or so by then.
Unlike Warcraft III, StarCraft II models have 2-3 times the actual physical geometry, use a different animation system and have 4 texture layers to skin (Warcraft III had only 1). Thus they are even more effort to create so you are looking at only 1 in the time people would take to make 3-4 Warcraft III models.