Kadett D intake bridge 1.3N for double carburettor

Hi guys, I have an Ascona B with 1.3N OHC engine, which was also installed in the D cadets. For the D cadets there was a suction bridge for this engine to be able to mount solex or possibly weaver double carburetor. I am looking for an expert report or other document for the mentioned suction bridge, such as an assembly instruction or any other information. Who can help me? A friend of mine may have the appropriate bridge but without a document or similar. cke built in ? Please help me, I’m slowly despairing of Irmscher there is no answer or sign of life. Your help should also not be for nothing… Greetings Old Town Bomber