get old item name for renamed files using TFS API

My current tfs will be retired in next few months.I am using tfs api to create a parallel tfs on a new server from the existing one. I have folders and solutions that have been renamed. I am iterating items and based on their changetype(add, edit, delete, sourcerename etc), I am checking them in destination tfs.

I am not able to get Old filename for a file, in order to use PendRename when the item that is being iterated is Delete|SourceRename or Rename.

I tried the mentioned solution :

https://social.msdn.microsoft.com/Forums/vstudio/en-US/f9c7e7b4-b05f-4d3e-b8ea-cfbd316ef737/how-to-get-previous-path-of-renamedmoved-of-file-using-tfs-api?forum=tfsgeneral

But, my changeset has a lot of changes and hence identifying a particular file seems difficult.

Do we have something that interraltes two items (the deleted and renamed) ones other than the changeset, because there needs to be a uniquely identifier that associated the two items so that they may appear together in TFS history?