Who supplies Hezbollah's rockets?

[LINK] Middle East Intelligence Bulletin, 2002
[LINK] Eaglespeak
[LINK] Rockets hit Haifa (reported by BBC News)

Israeli officials have been complaining about massive Iranian airlifts to Hezbollah since March 2001, when Prime Minister Ariel Sharon warned that Iran, "in full cooperation with Syria," was providing Hezbollah with large numbers of rockets capable of hitting "the center of the country."

Experts and analysts generally put the Hezbollah rocket force somewhere between 10,000 and 12,000 missiles.[3] The heart of this arsenal remains rooted in Hezbollah's massive stocks—perhaps 7,000 to 8,000—of 107mm and 122mm Katyusha rockets, virtually all of which were supplied directly from existing Iranian army stocks.