BERLIN, Nov 27 (Reuters) - The German government said on Thursday it was looking into alternatives to a delayed system of highway truck tolls and admitted uncertainty over the project posed risks to the federal budget. Transport Minister Manfred Stolpe told lawmakers during a lower house of parliament debate on the 2004 budget that the government may seek an alternative partner to the Toll Collect consortium, including Deutsche Telekom , DaimlerChrysler and France's Sofiroute .