I have dummy catenary masts that Arnold produced years ago which would be great to see again . Arnold also used an elastic thread to simulate the catenary wire but eventually I left that off. Real catenary is a nightmare with N gauge. I tried it with Vollmer. Fiddly, very expensive and easy to damage locos on curves if the pantograph leaves the wire. You can see the masts on my layout - the grey ones are Vollmer, the green ones Arnold.