GREP – transcribe superscript full-stop (period) to full-stop (period) superscript

Hi

I have received a Word file from an author where the footnote reference marker comes before the punctuation mark – full stop, comma, etc.

My in-house editor requires that they be transcribed and as there are 600+ I thought a GREP expression might do the trick. However, it is something which I am new to, so any help gratefully received.

I have just purchased the GREP in InDesign by Peter Kahrel but in the meantime …

Regards

Brendan