Decanter Cork Replacement

I have a whisky decanter that a friend gave me years ago. The cork has decayed, and no longer presents a proper seal for the vessel. Is there any recourse for replacing this cork? I have done some searching on the internet, and really cannot find any information.
Reply to

DrinksForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.