You can get it here:
https://thefilebay.com/14bS/
For me, sub-HD downloads through Netflix 4.0 are working, but the equivalent HD downloads through Netflix 6.0 + the tweak are not.
By not working I mean that the downloads aren't giving me any crypt0.key, and for the video .m3u8 I have this:
#EXTM3U
#EXT-X-VERSION:6
#EXT-X-TARGETDURATION:10
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-PLAYLIST-TYPE:VOD
#EXT-X-KEY:METHOD=ISO-23001-7,
URI="f10niQg0DsZqw5uIro8MDucooPo=",
KEYFORMAT="com.apple.streamingkeydelivery",
KEYFORMATVERSIONS="1"
#EXT-X-MAP:URI="http://23.246.6.145/?o=AQGST62xhTHsk1jsUJHdtSI4ryVV4kye3ZFYFbTgvJKrhw3 SkDEAulihIXOeFm662b7G4n4UiY0e4_ElClKi6g9te9cfl2m6k 2FKRT8dtMS5SlhYArKXZV4Z1BVEKWdaBRxgHbg&v=3&e=14100 65726&t=2-KEygddY3nVRFovfQcFObAptDg",
BYTERANGE="2067@0"
#EXT-X-PROGRAM-DATE-TIME:2014-09-06T16:55:25.000-04:00
...instead of the equivalent "crypt0.key" and "#EXT-X-KEY:METHOD=AES-128"
I installed the tweak through adding it to a repository + Cydia.