I am not sure about "the free version of ecoinvent" but you can of course always check the databases in Nexus. I would however also recommend that you check the modeling assumptions and available background datasets for the model that you have in mind, such as transport, electricity, asf.; you will most likely not find one process in any database that fully represents the product you want to model but rather will look for a database that provides "the rest" that you also need to make a complete life cycle model.
