There was a "wail tail" style and a "tea tray" style, they differed slightly
from each other. If you're in So. Cal (The L.A. area specifically) I can give
you the name of a very reliable, trust-worthy shop that can sell and even
install the tail, or at least provide an estimate.

you can find them at www.performanceproducts.com
                                   woody

    A used Turbo tail or "whale tail" should cost ~$500.  Check your local
Porsche club for sources.  PCA. Rennlist.  fleaBay also.  New, they are
closer to $1000.  It is important to add the front spoiler to do it
right.  I also *highly* recommend buying another decklid to facilitate
the ability to switch back quickly if you don't like it.  I dunno 'bout
you, but drilling holes in the original decklid would be painful for me.
 Many times, you can find a used tail/lid combo and I recommend buying
that.  This makes it a much easier job.
    I believe the "tea tray" is the same spoiler as the "whale tail."  Just
a different name in different places, but it's the Carrera spoiler that
Steve was indicating.  The Carrera spoiler does not have the extra side
lips for a slightly different look, is a bit more streamlined, and
provides less downforce.  They cost a few hundred more as they seem to
be more of the desired look amoungst the more streamlined 911s.  You
really must have the pronounced "hips" on a 911 for the Turbo tail to
complete it's look.
    I had a turbo tail on my 79 for a while.  Sometimes I thought it was
the bitchinest thing, and then sometimes I thought it was an
abomination.  I guess it depended on how fast I wanted to drive that day.

DS
95 993 Coupe