i just buy NEW pumps instead of re-mans. just a couple bucks more, and those aren't expensive by any means. as rocky said, there are only a few manufacturers.
doc, at 180k on the original, put a pump on ! and while you are at it, might not be a bad idea to put an idler pulley and a belt tensioner on it as well, while it's apart. heck, get a new belt too, unless you know for sure the belt isn't original.