Given the size of the boat it's no less work to replace the whole furler
. You really don't know how bad the rest of the furler is at this point. Cost is going to be a function of the forestay length. Given it has to be 100% removed including the forestay to be repaired I don't see that it is worth the effort to buy parts
even if available given it wasn't a very good furler to begin with. Profurl might be a budget
furler that would last better than this one did. You might want look at the forestay and see if it too should be replaced. A length of wire and some connectors won't cost as much as the labor to do this. Doing it yourself is also possible. You'll need some help. A good rigger will do this very quickly if you just replace the whole furler.