@davep - I had an idea; if the base images are the same on the 2L sticker (see image above), could I buy one from you?
I'd then do a high-res scan (to get a good, clean and correct base), then overwrite the numbers and letters (which I've already done once, so could easily redo). This, I believe, would provide a clear, accurate reproduction of the 1.8L sticker.
If so, I'll PM you my home address.
Thanks.