I wrote an interceptor to convert the older URLs to the new URL, this may or may not work for you, as it will depend on the changes in the url. I wrote that primarily for search engines to update and remove links, so if it is permanently moved the SE should update their records. But this will only work if your old URLS had predefined easy to use route entry points to convert.
Well I never went that far, but there is nothing to stop the rules for matching be user inputted. I just chose to hard code it, it was meant as a Q&D solution.