No answer for replacing glass, but I'm curious about smoked glass-- Is it to cut down on the heat of the sun? If so, there's always window tinting...
Our boat has screens over all the windows (which are quite dark). We removed the screens once for about a month. We really liked the different look, but the AC couldn't keep up with the heat! The screens REALLY help with cutting the sunlight! (and they're not that bad to look thru either)
-------------------------

1988 SkipperLiner 53x14
1995 Tracker Party Cruiser 32 *for sale*
2003 Chaparral 260 SSI
2000 Allegro Bus 40' DP