Is there any reason why you need that partiular version of the PowerShell Toolkit? Version 4.0 changed the packaging so that the single installer has the cmdlets for Data ONTAP (7-mode and clustered Data ONTAP), E-Series, and FlashRay. However, during the install process you can deselect the modules you don't want/need. As @Aparajita mentioned though, only the most recent version of the toolkit is published.
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