I have a gorgeous green translucent Waterman 100 Year pen & pencil set, but the pen cap has cracked, and I'd like to get it repaired. Can someone please refer me to the leading expert in this type of work? The nib is stupendous and I would love to return the entire set to top shape without worry. Thanks! (See - just because I'm no longer a professional pen dealer doesn't mean I have left the hobby! - this is one of those things I've been meaning to take care of, but didn't have the time!) James