Front forks are repairable and you can usually find fork seal kits for them from most spares suppliers. It’s best to do both of them at the same time.
Here’s a great page to look at for more information: http://viragotech.com/newtech/Fork%20Seal%20Job.htm
In what condition is the chrome on the forks? If they are becoming pitted, then it might be a good idea to get them hard-chromed again. A friend of mine has suggested a place in Luton that do them – A M Philpot Ltd.