Steinberg has a huge download archive on it’s ftp server. The Content for HALion 3 can be found here :
ftp://ftp.steinberg.net/Download/VSTi_HALion_3/Content/
It should be identical to the greatest possible extent!
If you need a HALion 3 version that works even under Win10 to convert fxb’s or fxp’s or just to compare programs in H3 and H5 take this one (will work with the H5 license) :
ftp://ftp.steinberg.net/Download/VSTi_HALion_3/3.2.1.1338/PC/
named update but is in fact a full-install without content 
Driver