Dwayne,
I've got a box full of centerpull brake calipers. Tell me what you need, and if I have it they are yours for the price of postage.
The ones on that bike appear complete, though - are you sure you need new/different ones?
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"Love is not the dying moan of a distant violin, it’s the triumphant twang of a bedspring."
S. J. Perelman