One other point to consider before deciding to refurbish the existing end cover is that you don't know the dimension for the internals of that cover. In other words, if you had a plan in place to repair that cover, to what dimensions would you make the thrust bearing portion of the cover? That information will not be readily available anywhere, yet those dimensions will be critical. I hate to say it, but your best bet might be to get the used cover off of eBay if you can afford to go that route and if that cover is in decent shape.