Didn't turn up anything useful in the Gtr magazines
Try using this Phil, take it to a good sticker man and he should be able to do the rest. Iron Chef might be able to help with the overall size since he has the R1 concept engine stickers on his car.
http://www.acromann.com/product_info.php?products_id=1338&osCsid=nwnthyjqbsmi
I think the real questions is though, when did you get the S-tune!?