According to the manual, and therefore most threads you'll read on the subject, the main timing cover bearing is a press fit and not a serviceable item, thereofre you need a new cover.
However, it had to be made and can therefore be remade, if you have the tools and the talent.
Not a job I've looked at yet but I'd not be surprised if someone makes a repair kit for it by now.
The original bearing is a press fit BTW, so it's not going to want to come off easily.
