The answers below are correct. You should go tot the townsjip and explain what you are looking for, from beginning to end, that documentation should be in the township offices "someplace" as each transaction would have to be recorded. Call the town and ask which department will be able to furnish these documents, there will probably (definately) be a fee attached to this.
"If it is not in the local MLS" There is no way this information would be available on your local MLS.
Good Luck! Let us know what you find out!
You can go to the town and see if they have any records. Or you can go to the county court house for a search that will cost a fee. A title search may do it also. Good luck!