Meredith
   I looked at the All electronics catalogue and you are correct. I was thinking
of curvature in a different direction. I have some neo magnets that are in the
order of 1/4" thick and are curved in the other plane, like the magnets of a
harddrive. I bought them at a surplus store a few years ago for $1 each. As many
of you may have experienced with surplus stores, you buy a few things thinking
they may be of use in the future but when the future comes and you need a couple
more the surplus store has sold them all.  I see the shape in the All electronics
catalogue but they are very thin, and therefore to many would be required to
replace the donut. The search  goes on. :)
Barry





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