[Arran]

I had to learn how to repair speaker cones some years ago simply because I had no source for replacements, and was told, at the time, that most reconing outfits had ripoff prices. If a speaker was to far gone to be repaired, usually with contact cement, or patches, I would use ones salvaged out of a junker radio, since most were 4'' ones anyhow. If they were warped I would cut photo negatives into strips and use them as shims between the voice coil and pole piece. This is why I wince at people using replacement cones with foam surround/hinges, that's usually the first part to rot away on more modern speakers, plus the clearance issues since they often stick out from above the rim on vintage speakers.