http://attotech.com/software/files/drivers/osx_fls_esasraid2_111209.dmg
(You're right - the link is currently broken, but the file is still there!)
Thankfully ATTO uses a very consistent naming scheme so I found the link to the last version, swapped out the name for the current version and there you have it… right from them. :)
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There is no intuitive interface, not even the nipple. It's all learned. - Bruce Ediger