After buying a Plaig bearing I replaced the line roller bearing in my old faithful 2500 Symetre the other day and respooled it. Seems good in the shed.
To find the right one I looked at the schematics and typed the number into an international auction website and it popped up. Checked the measurements in the description, purchased and two days and $6 later it was in the letter box. Easy as.
I was told it would cost around $60 for shimano to do it.