Ah, I am assuming these are old locked Xfrog TGOs then? Otherwise as Dune said you should be able to just right-click the TGO object and save the object as a OBJ. I haven't had issues with this besides reassigning textures, but with OBJs in general, that's common.
If you want, you could tell me the actual models in question, I may be able to acquire permission to split these models and export them back to you as two objects.