I've passed on some Esterbrooks with damaged or missing "jewels" and bought one off the bay where the damaged jewel was not that obvious. Is there a source for replacement jewels or has anyone done a repair on a chipped jewel? I thought about building up the chipped jewel with something like JB weld and filing it down to the proper contour and painting it with modeling paint, but decided the results may look worse than the minor chip. What have you done?