2005 Roadster Limited 94K. Rear window fell out. I did a quick and dirty temporary repair (4 years ago) and... well... it works so good that I've just been putting out all the other fires that happen in life. Guys notice it immediately. Women just tell me how nice my car looks!
3/16 Acrylic from Home Depot and some sheet metal screws. I used the old glass for a template. I looked into, but never pursued the rear window defroster that i could "stick-on".
I'm not good lookin, but I am handy! But god knows I'm no perfectionist. I'm sure someone could do something that might look more professional. Pics to follow.