Has anyone found a quality replacement door glass? Black dragon used to carry them but doesn't look like they do anymore.  

Not new, I have dr side and pas side used 240z door glass.

Thanks but looking for new. Unless they don't have any fine scratches in them?

You can sand and polish old glass or have it made new.   https://www.google.com/search?q=polishing+auto+glass+scratches&biw=1366&bih=673&tbm=vid&source=lnms&sa=X&ved=0ahUKEwiFpujqxPXMAhUNKFIKHdRjAd4Q_AUIBygC&dpr=1

7 hours ago, black gold man said:

You can sand and polish old glass or have it made new.   https://www.google.com/search?q=polishing+auto+glass+scratches&biw=1366&bih=673&tbm=vid&source=lnms&sa=X&ved=0ahUKEwiFpujqxPXMAhUNKFIKHdRjAd4Q_AUIBygC&dpr=1

Yeah, I already went down that road. It helped but I still have a few deeper scratches.

I just called a couple glass companies and neither could find any door glass, nationwide. Interesting.

I think your best possibility is to find one in good condition from a parts car.  I was in the same boat & purchased the driver door glass from another member, but have not got around to dealing with it yet.  At least there are  8 years of production that were all the same.

The door glass is not the same over all 8 years of production. 77-78 glass is quite different in how it mounts to the frame that connects to the regulator arms and is thus not interchangable with other years.

The glass mount frame is also different for 74-76 but the glass is the same 70-76.  The two short "C" channels where the regulator arms rollers run are positioned differently in the 74-76 frames than earlier ones. You will have problems with arms falling off the frame if you mix regulators and glass frames.  Even the door mounted guide channel at the front changed for 74-76.

The 74-76 regulators are different too as they have a wider offset where they mount to the door. I assume they were "improving" the glass fit and function and moving the regulator inboard 1/4" and tweeking the various guide channels made it work better. Then they gave up and totally changed the glass mechanism for 77-78. That stuff works fantastic.

Thanks for the overall advice about glass polishing. I have a polish kit coming. Time to freshen up some old glass!