tw_cli 9.5.1.1 has been available from 3ware for a while now. The sys-block/tw_cli-9.5.0.1 ebuild in the Portage tree works fine for installing 9.5.1.1 with just a simple rename. Easy fix. :)
Please don't CC maintainers yourself. Let this up to our bug-wranglers as they can assign bugs directly to the corresponding maintainer (like in this case where you CCed the primary maintainer to whom this bug should be assigned to, not CCed). Reassigning to/CCing maintainers.
InCVS.