Take a look at Boca bearing site. They have a list of turbine manufacturers. here's the link.
From what i understood. Most brand of turbine uses the same size diameter bearings for specific
turbine thrust class. Either D608/602C or D688/602C
The smaller the turbine, the bearing size will be D688/602C. Typically ranging from 7lbs to 15lbs thrust
D608/602C for turbines 16lbs and up.