Umm, I emailed STC for the STC ones, I made the ADSHEL one, found the Audi, GIO, AUS GOV, and SMH ones on the net, then blew them up and made some edits (contrast, sharpening etc.)
Was not a quick process but in the end I enjoyed the poster the most.
Micka.
EDIT: Made this A2 size - though I...