I have a book on international small arms that mentions these, I think. The Saudis have also used some S&W's, as have most Arab states that have good relations with the US.
T-Star
P.S. I found it: Small Arms Today by Ed. C. Ezell.
Prior to the fall of the Shah, about 7,000 Model 10's were sent to Iran, and some Model 15's were also acquired. Data on barrel length wasn't shown. It is known that the post-Shah regime has acquired many SIG P-220 and Beretta M-92 pistols. The SIG's were from a Portuguese source. S&W shipments not listed certainly may have also occurred.