One of the East Europeam manufactuers ( Legato ) have been promising one for a while - still nothing confirmed though.
This is the response I had, via Hannants;
In response to your question I have this reply from Czech Rep.....
"S-76 kit should be a resin model which he is preparing in
collaboration with MiKu models.
This S-76 model is not yet finished and he is not sure when they will
complete it"
Regards
Please join the queue !
A 139 would be nice too...........