Looking for a source for new or used parts for the single cylinder Ducati diesel, model DM 184. Need an exhaust manifold, gaskets, seals, etc. Any help would be appreciated. IF 291

Can anyone recommend sources for new or used parts for single cylinder diesel engines like the Sabb "G" or the Ducati DM 184? I need the raw water thermostat for a G model Sabb: G69D, G69dk, G69dm, G69dL, 969dL, G69dn, 769f, 769e. These are the individual parts and I do not have a part number for ...