I am currently working on a project that evaluates and compares the GHG emissions from trucks and rail transportation of a product from a production facility to the same destination. In this comparsion, we would focus on the truck and rail manufacture, Rail infrastructure (since the route for the rail involves the construction of a track and upgrade of an existing track), Track Maintenance, Truck and Rail Maintenance, and finally fuel production and fuel consumption. I dont have access to Ecoinvent database, what database to you use to account for the components mentioned above. Unfortunately, I do not have access to the Ecoinvent database. What other free databases do you recommend me to use that would be suitable for this project Scope?