Are you saying that missiles are being sent through Turkey? (Iran's access to Syria can be either through Iraq (occupied by USA) and through Turkey.
plus Hisbollah has had six years to resupply
Are you saying that these missiles were brought before US invasion of Iraq?
Nobody has implicated Turkey in the Iran-Hezbollah arms-trafficking. It's been Syria that is the waypoint.
Before the current Israel/Hezbo hostilities, they could easily move by sea. There was no blockage of Lebanese or Syrian ports. Might not be any blockage of Syrian ports even now. A blockage is an act of war you know, and Israel has taken great pains to assure Syria that they don't want to go to war with them. So even now the stuff could go through Syria, possibly by a roundabout route, or through some neutral third country. After all, you can't konw what's in a container unless you open it up.