Most bearing suppliers have a record of sales
to different vendors. Usually vendors will
buy a backup bearing to keep in stock.
Maybe Timken can tell you who else has bought
these bearings from them unless they think that
is priority information.
Try to find someone that has a bearing interchange guide. There my be an equivalent bearing, like FAG. Usually the bigger bearing supply houses have such a database. A good bearing supplier should be able to find the bearing as Timken didn't just make one.
Here are two different approaches to interchange data.
dimjim's idea of finding a customer from a vendor is a very good approach. There is also a service that has information on spare parts on the shelf at numerous companies.