When it came time to replace the bearings in my well used Enya 90 I ordered them from Boca. I'm sure it cost a bit more than from the local bearing supply house, but they were a very good company to deal will and the product was guaranteed to work. They're on the web - www.bocabearings.com

Edit to add about seals.

The bearings I got from Boca were sealed both sides. I pulled both seals off the rear bearing, as well as the back on the forward bearing so that oil could get through but left the front seal on the front bearing on. Prior to changing bearings that old Enya leaked oil like a Harley. Its been real good since.