Try http://www.noran.com :-}
or (copied from their "about Noran" page):-
2551 West Beltline Highway
Middleton, WI 53562-2697
USA
Western Hemisphere Sales and Customer Support
Tel.: 608 831 5125
Fax: 608 836 4461
Internet: micro_info@noran.com
All other U.S. inquiries:
Tel.: 608 831 6511
Fax: 608 836 7224
Internet: micro_info@noran.com
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-- David