Welcome to the Board.
I guess you have already found most of the links relating to Mika Glass.
Although there is also a Mika Glass in the Czech Republic (with contact details), I think you are in the right direction with the Polish entry. To shorten the search results, I used: TRYGAR PAWAL as part of the search and one page did translate for me but the google translate failed for others I tried (most likely my pc system is at fault as it is out od date and I have not yet set up my new pc).