as for replacing the bearing you could do just that but if its that far torn down Im sure the the dist shaft is prob also worn so prob be cheaper to replace the whole lot and you can get a whole kit for $159. from kaiser willys
www.kaiserwillys.com part #923068 this one is 12v electronic ignition or the other 12v one which has points and sells for 149. part #906725 after seeing the price on just the bearing of $29.99 makes sence just to do shaft also
they prob have the winch stuff also and then theres walcks
think this should cover your question