Sharpening Help

[ameerat42]

What? - Yes, you are reading it right. I am asking for some pretty specific help.
Normally PP-ing is nothing much to me, but I have been given a photo of a road
trip in Greece in 1962-or-3 (48-bit scan at 1200 dpi of a 6x6 Ektachrome), but the
main subject - the person who gave me this pic to fix - is OOF! He took the next
pic of his mates and that's OK - they're all in focus.

Short of using the likes of Topaz AI to sharpen it (by deconvolution methods) is there
some readily available way using Photoshop or GIMP to sharpen the area in question?
I have tried the GIMP Resynthesizing method but it hardly does anything. Other methods
in both these programs yield horrible results.

Ta.

Here is part of the picture I scanned showing the GIMP steps...
GIMPHelp.jpg