Give Mick Simmons a ring on 01386552949 if you cannot get one locally, if the bearing has just fallen apart when you take the reel apart it can be rebuilt and re used I have had to do this on three reels I have serviced, it is a cheaper bearing than the original mag and not as well made, I think the original bearing of the 525 mag will fit the 525 mag 2 I have not tried to do it yet but will with the next on one I service.