Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period.
The Wayback Machine - https://web.archive.org/all/20060629193225/http://www.simradusa.net:80/index.php?option=com_docman&task=cat_view&gid=100&Itemid=165
Downloads + Manuals 
AP9MK3_Manual Rev E
RA725 Manual (498)
WP32 Manual (347)