Spoke wheel conversion - bearing selection

My local motorcycle store managed to lose the top hat spacer I had fitted in the XV hub when they installed the tire.

The main reason for having to make a top hat spacer for the drive side bearing on the XV535 hub is that the required bearing is an odd size. The commonly available bearing to fit the hub ID 42mm is the 6004 which has an ID of 20mm.
There is a bearing that would fit and match the larger XV 750/920 axle OD but it's harder to find. The 6303/42 hybrid bearing is 42 OD, 17 ID, the only problem being finding a sealed version which is why I made the spacer. However, it looks like Honda part #91003-KRM-841 from a CRF 150 transmission is sealed, I just ordered one so fingers crossed!