Years ago, when I finally needed a new key for my 1966 305, I visited my local locksmith shop which has been in town for quite some time. Sure enough, he had seven Taylor blanks. I took ‘em all. They’re a bit bigger on the bow, but the blade was identical.
Interestingly, prior to my find at the locksmith shop, I visited a local university campus lockshop for the same search. This shop had everything but the Florida Keys...and a blank for my Honda.