I happen to have an electronic one available. You can take the pdf file up to Kinkos and they can print it out for you. Give me an email address and I can send it to you.
It also includes the 400 emblem placement if you need it.
68' Firebird 400 convertible, numbers matching, solar red w/ deluxe parchment interior. 66' Pontiac Ventura Hardtop 66' Pontiac Catalina Convertible
Here is the info Pete made available on line for everyone for installing the letters when adding a spoiler. Measurements are taken from the original placement on the decklid. It should help... http://members.rennlist.com/peteklager/FBSpoilerLetters.html