Finding medical oxygen, I live in Warsaw

I need to find a source of medical oxygen. I live in Warsaw. I have a prescription for it from a polish doctor here but she was doubtful that I would be able to find the necessary equipment in Warsaw and I have no idea where to look. Anyone have any ideas? Ideally I would just rent an oxygen concentrator because I'm only in Poland until this summer, but I know almost zero medical vocabulary in Polish.

Hi, I used last year a company called oxygen worldwide to arrange my medical oxygen in Poland. Perhas they can help you too.
Good luck,
Sarah Dove.