Question, couldnt they obtain SA-7s if they could smuggle weapons regularly?

It would not be a first, the IRA was involved in the plan to build surface to air missiles with IR homing in the 1980s. I think it had to do with Irish-American’s as they had access to the motors.

They can and they try to obtain SA-7s and longer range rockets (not home made) via the tunnels and via the sea.
Reffer to the Karin A capture

www1.idf.il/SIP_STORAGE/DOVER/files/8/34488.wmv