Cross reference to text in a running header/footer populated using <$marker3>

Using unstructured FrameMaker. On the master page footer I've put in Running H/F 13 and on body page use <$marker3> to put an ATA number in this location. I also have another location (hidden text) on the body page that I want this ATA number to appear. I use this text to help create the PDF bookmarks.

Is there a way to cross reference to the text in <$marker3>? The current cross-reference format is set up as -<$pagenumber> <$paratext[SectionTitle]> and looks like -201 Exterior Placards and Markings. I'm currently adding the ATA number manually so the cross-reference is 11-10-11-201 Exterior Placards and Markings. I've tried using the paratag for the ATA number with no success.

Appreciate any ideas.

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