If not maybe tweeners? They beat up Kane so they might be more good side.
There are many variables that can affect the cost of a job like this. First there is the material used. Whether you currently have cast iron or plastic is not a huge issue because either way plastic can be used.[assuming we are talking about a residence, different rules for businesses etc.] Accessability is another issue. If the problem is difficult to get at, it will take more time to repair which translates into more cost.Make the job as easy as possible to access. Overall this does not sound like a big problem. I'd say, with the limited info that I have, that you're looking at $250-$350 with material and a couple of hours labour. Good luck.
File a case against your neighbor for the illegal ditch that he made.