If all these former East Bloc countries are hurting, it only makes sense for them to use their existing Cold War military infrastructure to churn out high demand 7.62x39 ammo to the huge, ammo-hungry US civilian market for export and hard currency.
IMHO, here's the hole in that argument...
All the "former East Bloc countries" have already become NATO members or they are applying for NATO membership as fast as they can (up to and including Ukraine). They lived under Russia during the USSR and they did not like what they endured.
Not one of them is joining the Russian Federation voluntarily. Georgia citizens are in the streets every night protesting Russian influence and meddling in their country's affairs. As soon as Alexander Lukashenko dies (or loses power) Belarus will break free, which will be closely followed by Kaliningrad. China is threatening to swallow up far eastern provinces that were once part of Mongolia and ancient China. Even Chechnya is teetering and changes day-to-day depending on the dicey health of Mr. Kadyrov.
Why wouldn't these eastern bloc armories make the NATO standard 223 ammo which they now (or soon will)
need and forget about the ammo that reminds them of the "bad old days"? IOW, why build entirely separate production facilities just to export 7.62x39, when their armies will live on NATO std ammo. After all, if your argument is "export sales", then 223 has just as large of an audience (or probably larger) in the USA than 7.62x39.
Nope. IMHO, they will concentrate on 1 single caliber, and that caliber will be whatever the NATO standard rifle round is.
Don't get me wrong. I shoot 7.62x39 and don't want to see prices go higher either. But the cards for this game have already been dealt and they do not favor Russia and the former Soviet republics, or China.
Again, this is simply my opinion.