dubdisciple
This is the link Acoustica Mixcraft provides for the kjerhaus plugs:
 
http://acoustica1.cachefly.net/other/Classic-Effects-Installer.exe
 
They actually include them with their DAW and provide installer. This is safe

I tried installing this in Win8.1 and it's not showing up. Does Mixcraft have to be installed?

no Mixcraft needed.  It just simply unpacks the .dll into the programs(x86)/vstplugins folder.  I never tried on win 8.  works fine on win 7 for me.  i did have to scan a couple of times for some reason. Make sure that folder is on your list of folders to scan and that the dlls copied there.