Did the Greeks ever adopt foreign equipment ..

[hoplite14gr]

The only grip (lave) that existed before 800 B.C. - if we trust Herodotus - was a grip behind the the shield boss. Large shields were were also supported from a baldric (telamon).
According to Herodotus the Carians invented the arm loop (porpax) aand placed the grip to the right (internal) side of the shield (antilave).

Also Western Colonist Hoplites might have adopted Iberian or Celtic equipment pieces.
Philip II is said to have been murdered with a Celtic dagger.

Kind regards