You could try:http://www.enduringamerica.com/ which is a UK-based website that watches the world and has a strong Iranian theme.

Israel watches Iran closely, so perhaps there is help there? In the university research centres.

There was a large Afghan refugee population in Iran, many of whom did return after the USSR exit and perhaps the UNHCR etc can help. I'm not sure if after violence increased that the return was completed.

At one time there were press stories about the extent of Iranian influence in Herat, might they help? IIRC Karzai removed the local warlord, sorry governor who leant too far towards Iran.