Reconing is more difficult than just replacing the foam surround since you need to be able to solder the voice coil connections without damaging the cone. You can get foam surrounds from simplyspeakers.com but a cone with voice coil will likely have to come from the manufacturer (a new cone should include the surround). The crossover and cabinet were designed for that specific speaker, so an exact replacement is always preferred. If you drop in a different speaker, even if the impedance rating is the same, the result will be a roll of the dice, as speaker impedance varies by frequency and is different for each model. All depends on what your target result is and how much you want to spend. If you're doing this on the cheap, maybe email PartsExpress and see if they can recommend a driver.