Sorry - I had a root around through my spares and found a set I’d forgotten about that I can use, I’ll pass on these. All yours @klunkrider if you still need them.
BTW: a bit late, but those Shimano labled brakes had been not a cheap model, but it was one of the last series of cantilever brakes sold by Shimano, late 90ties or even early Millenium for Cycle Cross bikes etc. called BR-R550.
To me those even look pretty good (decals can be cleaned)