large transparency printing??
Try these folks... http://duggal.com/
I don't know if they have exactly what you are looking for but they do a lot of "high-end" and custom work so there is a good chance that they can come up with something if you are willing to come up with the cash!
No connection... I used them a couple of times in the film era, years... no make that decades... ago.
Frank ( http://www.gorga.org/blog )
|AF4_2483 Surfing the Serengeti by DaveInHouston|
from Hot Air Balloon view
|Peregrine Falcon by Psychic1|
from Best Wildlife Photo of the Week - 4