An interesting answer from Mr. Sulc (the boss of Eduard) on a Czech modelling forum (can I mention other forums here or is it a no-no area like on other forums?). :))
He was asked about plans for MiG-21 SMT, R and bis versions in 72nd scale.
The short answer was:
Zatím na to žádný časový horizont nemáme.
in G. translation : We do not have any time horizon yet. or in another interpretation:
Yet it is no timeframe we have.
As far as it is known for the moment only the PF and PFM versions are in the pipe line with release very late this