twisparkle, the reason for that might be because the Lumia920 use an AV flex with the jack soldered onto it. It is a bit costly but it is available at places like this and here as well. Hope this helps, good luck
We have a chance to guarantee our right to repair electronic
equipment—like smartphones, computers, and even farm equipment. This is a once-in-a-generation
chance to protect local repair jobs—the corner mom-and-pop repair shops that
keep getting squeezed out by manufacturers.
Join the cause and tell your state representative to support Right to Repair. Tell them you believe repair should be fair, affordable, and accessible. Stand up for your right to repair!