At most festivals you're sure to come across The Chanty Cabin which sells recordings from most people active on the shanty circuit. Those nice people Ken & June also stock our material. 

Their address is  -mail:ken@chantycabin.co.uk

If you want details about maritime or shanty festivals home or abroad, the Bitter End site is the one to look up:

www.dspace.dial.pipex.com/alan.j.hardy