That is exactly my problem. The upper corners are starting to peel up. I restored my car in 1995 - 2000 and several of my decals need to be freshened up and changed, but I cannot find correct decals now.
Attached is my repro decal which has the "PRINTED IN USA" in the lower RH corner, but the typeface is slightly different and not as well defined as the original.
Speaking of decals, one other correct decal I need is the #3934894 "BM" code rear leaf spring decal tag (for '69 with multi-leaf springs). Per Jerry MacNeish's book, the BM tag should be silver paper with black letters. Today, I can only find yellow paper with black letters. Again, back when I restored car, I purchased the correct silver paper tags from Rick's 1st Gen, before it was sold to Ecklers.
This makes me wonder why we do not find correct decals today, with better technology to make them. Decent repros were available at one time...go figure.