RE: Welcome to Club SAITO !
Gary:
Without checking memory says the front bearing is type R6. What you want is the R6C-2RS. Firct "C" for ceramic, the "-2RS" for double rubber seals.
If Paul is out of stock on the ceramic with the double seals, get a high speed stainless bearing for the front - the seals are more important than the ceranic balls. It's the rear bearing that gets the constant hammering, stay with the ceramic in the rear.
And install the front bearing with both seals in place.
A stainless bearing in front will save you a buck or three also.
Bill.