Sorry,
these are completely sold out, and will not be manufactured in the future.
See:
http://www.dontronics.com/simmstick-ten-years-on.html
DT202 Two Inch SimmStick Proto Board

Features
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"Sea of holes" type prototyping board
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16 x 30 holes (.1" center)
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4 mounting holes
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SIMM30 edge connector
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Size: 2 x 3.5"
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Thickness: 50mil (1.27mm)
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Accepts:
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DIP40 and smaller DIP packages
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PLCC84 and smaller PLCC sockets
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30Pin Single row pin-headers
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IC type pins
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Reusable design:
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Circuitry once made can be used in many SimmStick(tm) systems.
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