I don't know when Honjo fenders first were produced, but many of their models are replicas of old French fenders. The H-40 (smooth) is exactly the same as the old Cagnion used on many Singers. The wider hammered ones also are a replica of a Lefol model. The narrow hammered ones and the peaked ones don't appear to have a French prototype.
Most Taylors (all tandems from the 1980s) I have seen came with chromed steel fenders. These look the same as the H-40, except that the Honjos are alloy. You could use the Berthoud stainless ones, which are very similar, except stainless.
I do have a pair of somewhat rusty (in spots) chromed fenders that came off a 1984 Taylor tandem, if anybody needs them.
Finally, Taylors that were equipped with French-style fenders appear to have been equipped with French-style eyelets (no threads). So if yours has eyelets, it may be more correct with plastic fenders (Bluemels)?
Hammered fenders fell from favor for top-end bikes in the late 1940s (at least in France). They look nice, though.
Note: All of the above is based on personal observation. I am no Taylor or Honjo expert.
Jan Heine, Seattle