I have good news (11/29/04)!! As of last week I have managed to dig up a Z20 option spoiler and rear spats. I can't wait for the shipment. Sadly the front spats were not with the car. Still I'm very pleased over finding this super rare part. The Z20 package was only available in 1988 firebirds and it was a dealer installed option. I've heard rumors of less than 600 actually done.
Here's the Dealership Flier for the Special Appearance Package (Z20).

OK, I have my package finally!!
Here's the spoiler:
Here's the rear spats (fender flares):

Masking taped to the car for a test fit!
I have the mold started for the rear spats. It still needs a lot of finishing work before it's ready. I've pretty much moved onto working with the 1LE heater boxes and the new 383 for now. I've been itching to get the 383 in the car.
My Formula should look similar to the car shown below. These pictures were downloaded and modified from Thirdgen.org Forum Thread

Site Index:
Page 1 - Introduction
Page 2 - Current Project To Do Lists
Page 3 - The Interior
Page 4 - 2 18" Kicker particle board box (old design)
Page 5 - 2 18" Kicker fiberglass box custom
Page 6 - General Mods
Page 7 - My Z20 Special Appearance Package <-- You're here
Page 8 - My fiberglass non AC heater box mold (1LE version that has been discontinued by GM)
Page 9 - New High-PO 383 in the build
Page 10 - Glasstek Hood Repair
Page 11 - Fiberglass Box How-To
Page 12 - My Xbox Game for 1� I bought from the store with proof
Page 13 - SOLD! Twin 62mm T4 Turbo Kit From BBS DESIGNS for 1200 HP! SOLD!
Page 14 - To Do List before motor completion