Gordon I'm not sure what you're needing it for or if another type of wood could be substituted. Peruvian Teak, Ipe and Cumaru have similar color/hardness/hardiness. If you could use an optional wood, Gene at Amazon Exotic Hardwoods in Harrisburg is a great guy and has bent over backwards to help me. Phones are:
(704) 900-2982
(980) 521-5997
His website: http://www.amazonexotichardwood.com/index.php
Most of the flooring and decking he sells also is available in demensional stock too.
(Check out his plywood too. I'm using it for cabinet backs and other non-show surfaces. Light and strong.)