Those seem to be the scarcest ones for some reason. I see three options if you don't find one soon on here.
1) buy one from Passon or Brewers
2) Turn down your bearing retainer
3) Have the opening on another bell opened up. I have one with a 4.80 opening, that has obviously had that done to it. It doesn't have the factory chanfer in the hole, and it is still just a little too tight for my 4.78 bearing retainer.
Good luck with it.
