Based on the internet searching I just did, sadly, I would say that it is doubtfuldoesn't look very promising.
List of surviving A-7 Corsair IIs: https://en.wikipedia.org/wiki/List_of_surviving_LTV_A-7_Corsair_IIs
It looks like Greece flew the last ones, retiring the last one in October 2014. I have no way to see what they did with them after retirement. https://theaviationist.com/2014/10/27/haf-retirement-a-7/
I don't know how current the info is at this site: https://www.planelogger.com/Aircraft/ConstructionList/A-7
It lists ZERO A-7s in the Hellenic Air Force fleet (not even showing any as being stored): https://www.planelogger.com/Airline/Fleet/Hellenic_Air_Force/172406
I just searched David Monthan AFB in Tuscon on Google Maps to see if there are any A-7s because of this photo: https://www.airliners.net/photo/USA-Navy/LTV-A-7E-Corsair-II/2446637
and do not see any A-7s stored outside there.
That's all I can figure out on the internet. Hopefully someone who has more specific knowledge will come along (I'm not a warbird expert by any means).