I am about to do this, after having my car checked out from the previous thread:
http://986forum.com/forums/general-discussions/34147-saint-louis-specific-local-shop-fix-rear-window-replace-top.html
Shop I took it to pointed out all the wear spots on the top and, I have to admit, they did feel pretty thin. He said he wouldn't even bother just stitching the back window up, that the top will need to be replaced in the near future.
ebay user "topsonline.com" sells tops with glass window and defrost (nice feature in the midwest) for $570 shipped
Porsche Boxster & S 97-02 Convertible Top w/Defroster Glass window, 6yr Warranty | eBay
I won't install it myself, but I have a friend who owns his own mechanic shop that I'm sure can do the install in a few hours, so about $1,000 total and I can be done.
Question remains: besides Wret, has anyone else bought a convertible top off of ebay? What were your experiences?