Dumb Iranian Airforce question

I got a dumb question – we know that the Iranian’s have been able to develop two “new” fighter aircraft the HESA Azarakhsh and Saeqeh (along with their clone of the Cobra Helicopter), which are derived from their F-5 Tigers but does anyone know if they are new builds (i.e. new airframes, avionics and engines) or just re-conditioned Tigers.

If they are the former can we expect them to extend this programme of building new fighters based on tweaking aircraft they already own and if so can will we see HESA built versions of the Phantom and Tomcat anytime soon? Plus is there any evidence that Iran has gained access via non-conventional routes to more modern technology which would allow them to incorporate more modern radars and EW systems in their aircraft?

PS You got to love Wikepdia as they have a section on the Iranian airforce which states “The Jerusalem Post reported that Iran has signed an arms deal with the Russian Rosoboronexport arms group to buy 250 Su-30 MKM warplanes and 20 Il-78 MKI aerial tankers. It is reported that Israeli defense officials were investigating the potential Iran-Russia deal, in which Iran would pay $1 billion a dozen squadrons’ worth of the jets.”