I would replace with new of the original style, use some never seize and forget about them.
In my option lots of stainless hardware for no reason other than "looks" or hardware of the incorrect style or head type is an eye sore.

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-