I found this bearing site that has some that should work. Scroll down to "Inch Miniature Bearing sizes" or "metric miniature 1mm to 9mm bore". bdebde, was that .047 the size of the bearings you found or did you measure the axle? I lost my micrometer
http://www.bocabearings.com/prod_map....cfm?showall=y
They're not cheap but if you buy 25 or more you get 20% off.