Anyway this spare parts chase is most probably soon coming to an end with the arrival on the market of large metal 3D printers that will certainly one day or the other finds its way to Iran via a friendly country.
Colour me sceptical on that 'soon', at least as far as forged (in the metallurgical sense!) components are concerned. In any case I think it unlikely that Iran, with its domestic petrochemical, nuclear and aircraft industries, is limited by its manufacturing capabilities; more likely that lack of technical data is the blocker to making its own spare parts. Additive manufacturing doesn't solve that problem, and introduces a whole new world of certification issues.