Sorry for the delayed response, I've attached photos of the connections I'm talking about. I have removed the fuel tank.
The pick up and return have the rubber gasket/seal/o-ring piece that has deteriorated and does not seal any more. This is what I'm having trouble removing from the tank. Do they twist? Do they pull? Are they from another car?
Also the sender unit gasket I cannot seem to find, I'm guessing original was cork?