There should be so incredibly much to gain from such a move to make it worthwhile, that it seems pretty unlikely that anyone would care of the mullahs so much. The usual suspects must have seen the writing on the wall and pretty much have their plates full at the moment or are in such of a happy place that backing a failing regime with more than thoughts and positive vibes would yield any concrete benefits.
That being said, I wouldn't be surprised at all to see some bits of Iranian nuclear/rocket tech/marine build know how to appear in the bestests of Koreas. Can't think of too many other places to have any particular need for such stuff, unless some random country in Africa wants to have a go..