There are very few licensed kits. In fact, I can only think of a few vinyl models from Billiken and Geometric and Halcyon, all of which are long out of production but pretty available via eBay. I think Geometric's stuff, including some resin busts, are still available. I'm not aware of any licensed alien or predator resin kits, save for the aforementioned Geo busts. I would heartily recommend predatorstuff and Nightmare Collectibles for "original" resin kits. These may not be licensed, but are not recast like the majority of the stuff on the net.