RE: ME hours counter on tach out
Talk to a gauge repair shop. I'm at work now and don't have access to my magazines, but Hemming's Motor News has many listings of repair companies. They can rebuild, repair, rescreen the face, put in new glass, new rim, etc. as needed.
Any decent size newstand will stock Hemmings, or I can post some numbers tomorrow. Not all places do all types of gauges, so you'll want to call around to several.