+++++++1 to just replace the receptacle. You will get a vice grip type connection, and superior audio performance. I've tried well over a dozen receptacles, and all improved the sound over a stock socket. Look around for prices, they can vary by as much as $50 per unit
I use (and can highly recommend): Furutech GTX-D(G or gold) $165, Furutech GTX-D(R or Rhodium) $180, Oyaide R1 (Not SWX series) $160, and for the more affordable range Acme Audio Labs (Silver, cryo'd, CFC coated) $75