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It (almost certainly) will be possible.
SJS are my goto for things like this, you need to know what to look for though, seems Shimano call them 'Stroke Adjusting Bolts'.
They don't seem to have the ones for your particular derailleur in stock but plenty other DA ones that might fit, give them a call or email and they'll see you right.
https://www.sjscycles.co.uk/search/?term=dura%20ace%20stroke
M_V
Does anyone know if it's possible to buy a replacement high limit screw for a rounded Shimano R8050 Di2 front derailleur?