Or not look at SS as a position for an upgrade. Gven the very weak FA class, any team looking to move a star player like Neto or De Le Cruz is in the driver's seat for their demands.
The simplest path might be to sign Jazz Chisholm for 2b, especially if the Yankees as rumored are not offering hima QO (per MLBTR). Hold Story as a placeholder for Arias.
Chisholm 2b (granted, not an ideal OBP)
Anthony LF
Contreras 1B
Abreu RF
Mead DH
Rutschman C
Rafaela CF
Story/Arias SS
Durbin 3B
It does give the Sox a better top of the order than they had this year. Then you need to replace Gray, who likely declines his half of the mutual option. Michael King? Trevor Rogers? Shota imanaga? Freddy Peralta? There are at least decent pitching options.
It turns out you can put all your eggs in the Story/Arias basket if you're counting on them to bat 8th or lower.
They could also put Mead at 2b and take the defensive hit, but it's not like there are good DH options in this class..,