There is a couple still made in 1" , I believe by Marzochi or Manitou it would cost more then the bike is worth to be honest though. You can scour e-bay see if you can find one cheap. WHy not just keep it as is and keep it as a rainy day bike? You also have to factor in buying a new headset and stem since the fork will most likely be threadless. And I bet the current one is threaded.