I just found your request. I am searching Burzynskis in several areas in Poznan/Poland, and maybe its nothing, but maybe it leads to something. I found a connection between Janowskis and Burzynskis in the parish of Panigrodz, which is in the Margonin district.
If you think it could help you I could give you more details.
As I do not have any dates and don't know if you have been sucessful in your search by now.