It's impossible to find a stat about assembly/import. I hope you guess that. Madara can't say nothing because they haven't statistics/data at all (trust me). Mototehnika can't say nothing too about the import (because if they had some data, they haven't it anymore as this company was fallen down since a while).

Again, you are basing all your research on Polish sources. Here in Bulgaria this truck was never and nowhere called "Madara 400". And I can't prove the fact that it was never called by this way.