With my tank cover the key can be turned, but it does not lock the lid. I already tried the search and apparently these lids are mechanically too weak against violent opening. Have already had relevant experience with gasoline thieves here in my area. And who does that, will quickly have out which vehicle types are there slight victims. Thus, it would be quite useful to have a reasonably solid lockable lid on the tank. Does anyone have experience with replacement tank covers from ebay etc? Can the lock be exchanged for the old lock with these spare parts, so that I don’t need two keys? Is there perhaps other better tank covers of more modern vehicle models that would fit on the Lupo tank?