MEMORABILIA
The GNX Book
This "pleather"-bound book came with each car and was serialized to match the sequence number. Despite the statement "printing limited to 547", there were plenty of un-numbered books that can be found. Which is good because this book belongs on your coffee table!
It is prefaced by Buick's history of race cars, the GSX 455, V6 turbo power and then features the GNX project from conception to prototype to assembly line. Most subsequent books and web pages get their information here. Get this book.

Jacket
This jacket was sent to the original purchaser of each car. I'm told they aren't numbered and run small.
Thanks to Luigi for the pics
Owners Supplement
The owners manual supplement is an addition to the Regal's owner manual. It contains explanations of all the enhancements with clear drawings, along with the wiring diagrams for the instrument panel and some specifications. These are much more rare than the pleather book and worth having if you are a fanatic.

The ASC Fortunate 500 poster
With Jim Ibusuki's original image that was later turned into a print.

The Buick promotional poster

GMP/Peachstate 1:18 Scale GNX Die Cast Model
This is an EXCELLENT model and a must-own for the fanatic. They are a limited production run from GMP Peachstate and are long sold out. They can still be found on eBay. They are numbered, but the first 547 were sold as a package with the Mike Doble print below.
The die cast also comes with a small repro of the factory sticker with specs on the back.
GMP/Peachstate 1:18 Scale X RAY Die Cast Model
This white die-cast "GNX" is a replica of Rick Hunt's T-type, which he styled to represent what a white GNX would look like. Since Rick was an ASC employee during that time, he had the ability to pull this off using high-quality fabrication. My understanding is all the mechanicals of a true GNX were installed in this car. Rick decided to call it "X RAY" because the white/black trim almost resembles an x-ray version of a true GNX. See the LINKS section for a Featured Vendor that sells these die casts.

GMP "GNX Transporter"

Monogram Hi Performance Series
This is a plastic 1:24 scale model from Monogram. It was produced in 1988 and can still be found on eBay. The prices have dropped since the GMP die cast came out. This model has some minor inaccuracies because it's from the same mold as their Grand National model. Still, it's worth having.

Click here for a page that shows all the Turbo Buick plastic and die cast models
Epitome Exclusives Print
I'm not a big fan of this print, but it was part of the package to get the GMP die cast with matching sequence number to my car. These are signed by Mike Doble and show up on eBay over $200. There are only 547 of these. (picture quality is intentionally poor)

Hot Cars Folder
This is a really cool print to laminate and show with the car. It contains good pictures and facts and is often available on eBay for around $5. One error on the card lists the horsepower of the Grand National at 345hp. (picture quality is intentionally poor)

Evolution Poster
This one makes a good display piece for car shows because it clearly lists the modifications. If you'd like to purchase one, the Featured Vendor is listed in the LINKS page.
(picture quality is intentionally
poor)
More- There is more "functional" memorabilia in the My GNX section. If you have memorabilia you would like to see pictured here, please email me.