Convert endnote/footnote to regular text

[Cobb78]

I am working on a file for someone which is full of footnotes/endnotes. I need to (for conversion to another filetype) make those in-text references (superscript LETTERS) become regular text (not linked notes). I have found a fix, but it replaces the notation letters with superscript numbers. It has no option to make it superscript letters. The author of the file is pretty adamant that he wants the footnote markers to be superscript letters.



Without manually typing in the 3,000+ superscript letters, is there a way of doing this?

Thank you in advance.

BC