The Red Devils have all but tied up the arrival of the Argentine enforcer, but despite adding him and Luke Shaw to his backline, the Red Devils gaffer also wants the Ajax ace.
Blind starred for Van Gaal as Holland shone in Brazil earlier this summer, and the experienced Old Trafford chief wants to set up a reunion with him.
The Amsterdam giants have already suggested that offers of around £15m will be accepted, and now United are thought to be ready to push a deal.
Blind is able to play at left wing-back – which would provide cover for the injured Shaw – but he spent most of last season in a holding midfield position for Ajax and has even been talked about as a future centre-back.
Angel di Maria is also on their agenda, while a move for Arturo Vidal looks to be on ice as Fredy Guarin is now a target.