[nuconvert]

"The Syrians are interested in solid [fuel] rocket motor technology and were trying to acquire that from Russia," but had no luck doing so, "Iran bought remnants of one of the Russian rocket-motor factories and then sold it to the Syrians."

The Iranians and Syrians have been reported to have been having a lot of meetings lately. I think the Syrians have been filling up their shopping cart(s).

[F14 Pilot]

These countries have been sending SCUD Missiles and some other weapons or Balistic Missiles to Iran since 1980's:
Libiya, Syria, Yemen, North Korea, China.
China provided Silk Worm Surface to Surface missiles and some Fighter planes.
Libiya, Syria and Yemen sent SCUD missiles to Iran in the 80's.
North Korea also provided them with Technology and trainings. There are evidences that N. Korea also sold No-Dong's Engines to Iran.