Old thread, but someone might use it - nice metal keypads, waterproof, 
vandalproof, not too expensive.

<http://www.rapidonline.com/productinfo.aspx?tier1=Electronic+Components&tier2=Switches&tier3=Keypads&tier4=Anti+vandal+metal+waterproof++data+entry+keypad&moduleno=73488&catref=78-0207>

Djula
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